KR102222628B1 - Impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust, and shock-absorbing pad made of the composition - Google Patents

Abstract

The present invention relates to a composition for obtaining an impact-absorbing pad for artificial turf, which is easy to reduce carbon and collect fine dust based on biomass plastics, wherein the composition comprises, based on 100 parts by weight of a mixed resin polymer comprising biomass plastics, low density polyethylene (LDPE), and ethylene vinyl acetate (EVA): 1 to 20 parts by weight of calcium carbonate; 0.5 to 10 parts by weight of diatomaceous earth; 0.1 to 5 parts by weight of iron oxide; 2 to 5 parts by weight of a foaming agent; 0.05 to 2 parts by weight of a crosslinking agent; and 0.05 to 2 parts by weight of a release agent. In addition, the present invention relates to an impact-absorbing pad for artificial turf, manufactured by using the impact-absorbing pad composition for artificial turf, which is easy to reduce carbon and collect fine dust. Therefore, as the impact-absorbing pad for artificial turf, which is easy to reduce carbon and collect fine dust, of the present invention, is made of the composition containing diatomaceous earth based on the mixed resin polymer containing biomass plastics, the impact-absorbing pad reduces carbon dioxide, and has functions of collecting, decomposing, and cleaning fine dust, storing moisture to reduce the lawn temperature, preventing mold and bacteria growth with antioxidant activity, and eradicating insects by absorbing insect body and epidermal moisture.

Description

Impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust, and shock -absorbing pad made of the composition}

The present invention relates to an impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust, and to an impact-absorbing pad made of the composition, and more particularly, to a polymer containing biomass plastic containing biomass. The present invention relates to a shock absorbing pad for artificial turf having functions of reducing carbon dioxide and fine dust, reducing field temperature, and inhibiting bacterial growth by adding diatomaceous earth powder to the composition of an artificial turf shock absorbing pad.

Recently, there have been many cases of construction of playgrounds in schools or public facilities as turf grounds or artificial turf grounds. The natural grass field created for the safety of users and the effect of landscaping is made by sowing grass seeds or replanting grass.

In Korea, where the winter season is long, the number of days of use of the natural grass field is only about 40-50 days a year, and the efficiency of the playground decreases sharply if the use of the lawn is restricted to protect the lawn. In addition, natural turf requires careful attention to watering and maintenance due to damage.

Therefore, the construction area of artificial turf stadiums, which are highly utilized compared to natural turf stadiums, is increasing rapidly. The shock-absorbing pad for artificial turf required for the construction of the artificial turf field is made of a product that is based on polyethylene, polypropylene, polyamide, etc., and has the impact absorption and resilience required by consumers by mixing additives such as a foaming agent and a crosslinking agent.

The plastic-based shock-absorbing pad for artificial turf can implement a predetermined shape and color during the foaming and molding process, and has an advantage in terms of reducing production cost, but it exhausts limited petroleum resources and discharges carbon dioxide during the manufacturing process. I have a problem.

In order to solve this problem, studies on containing bioplastics, which are more environmentally friendly plastics, are active.

Korean Patent Registration No. 10-1962719 (2019.03.27) proposes'carbon-neutral bio-based plastics with improved mechanical properties, thermoplastic biomass composites used to manufacture them, and manufacturing methods thereof'. Bio-based plastic is a technology that uses biomass as a raw material to produce plastic (plastic).

The bioplastics are plant-derived biomass, biodegradable plastics that are 100% degraded in nature, and biomass (bio-based) plastics that eliminate the disadvantages of biodegradable plastics by polymerizing plant-derived biomass with existing plastics. I can.

The plant-derived biomass is a carbon-neutral plant and refers to plant resources, microbial metabolites, seaweeds, etc., in which carbon in the atmosphere is fixed by photosynthesis. It is known to contribute to the prevention of global warming by not increasing the total amount of carbon dioxide on the earth even if it is decomposed.

The Applicant contains diatomaceous earth in an impact absorbing pad composition based on a polymer mixture containing biomass PE produced by polymerizing carbon-neutral plant biomass and polyethylene to reduce carbon dioxide. A shock-absorbing pad was developed to construct an eco-friendly artificial turf field that users can use with confidence by manufacturing pads and adding functions to collect, disassemble, and wash fine dust in the air.

Republic of Korea Patent Publication No. 10-1384345 (2014.04.15.) Korean Registered Patent Publication No. 10-1962719 (2019.03.27.)

An object of the present invention for solving the above-described problems is to provide an impact-absorbing pad composition for artificial turf that is composed of a polymer mixture including biomass plastic, low-density polyethylene, and ethylene vinyl acetate. have.

Another object of the present invention is to provide an impact-absorbing pad composition for artificial turf that is composed of calcium carbonate, diatomaceous earth, iron oxide, a foaming agent, a crosslinking agent, and a releasing agent in the polymer mixture.

Another object of the present invention is to provide a shock-absorbing pad composition for artificial turf, which is composed of biomass plastic containing 20 to 25% by weight of a biomass composite, and is easy to collect fine dust and reduce carbon.

Another object of the present invention is to provide an impact-absorbing pad composition for artificial turf, wherein the biomass plastic is composed of biomass polyethylene, which reduces carbon and facilitates collecting fine dust.

Another object of the present invention is to provide an impact-absorbing pad composition for artificial turf in which the polymer of the biomass plastic is composed of linear low-density polyethylene and medium-density polyethylene in a weight ratio of 4:1 and is easy to collect fine dust and reduce carbon. It is in providing.

Another object of the present invention is to provide an impact-absorbing pad composition for artificial turf, wherein the biomass plastic has a function of reducing carbon dioxide and is easy to reduce carbon and collect fine dust.

Another object of the present invention is to provide an impact-absorbing pad composition for artificial turf, wherein the diatomaceous earth is composed of freshwater diatomaceous earth having a high silica content in a powder form.

Another object of the present invention is to provide a shock-absorbing pad composition for artificial turf that has a function of collecting and decomposing fine dust by the diatomaceous earth and washing it in rainwater.

An object of the present invention for solving the above-described problems is a function of reducing carbon dioxide by containing diatomaceous earth based on a polymer mixture containing biomass plastic, a function of collecting, decomposing, and washing fine dust, and a function of storing moisture in the field temperature. The purpose is to provide a shock-absorbing pad for artificial turf that has a function of reducing moisture, preventing fungal and bacterial infestation with an antioxidant effect, and absorbing and eradicating moisture in the body and epidermis of pests.

The characteristics of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention to achieve such an object is composed of a polymer mixture including biomass plastic, low density polyethylene, and ethylene vinyl acetate.

Another feature of the impact-absorbing pad composition for artificial turf that reduces carbon and easily collects fine dust of the present invention is composed of the polymer mixture including calcium carbonate, diatomaceous earth, iron oxide, a foaming agent, a crosslinking agent, and a release agent.

Another feature of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention is that the polymer of the biomass plastic is composed of linear low-density polyethylene and medium-density polyethylene in a weight ratio of 4:1. .

Another feature of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention is that the biomass plastic is composed of biomass polyethylene and has a function of reducing carbon dioxide.

Another feature of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention is composed of a biomass plastic containing 20 to 25% by weight of the biomass composite.

Another feature of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention is that the diatomaceous earth is composed of freshwater diatomaceous earth having a high silica content in a powder form.

Another feature of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention is that the diatomaceous earth collects fine dust, decomposes itself, and has a function of washing in rainwater.

The characteristics of the impact absorbing pad for artificial turf of the present invention to achieve the above object are the carbon dioxide reduction function, the function of collecting, decomposing, and cleaning fine dust, and storing moisture based on the biomass plastic containing diatomaceous earth. As a result, it has the function of reducing the temperature of the betel, preventing the growth of fungi and bacteria through antioxidant activity, and absorbing and eradicating moisture in the body and epidermis of pests.

The shock absorbing pad for artificial turf according to the present invention as described above is manufactured by adding biomass plastic to a polyethylene main material. Therefore, the biomass plastic contained in the shock absorbing pad is a plant resource, microbial metabolite, and seaweed in which carbon in the atmosphere is fixed by photosynthesis, and has the effect of contributing to the prevention of global warming by not increasing the total amount of carbon dioxide during chemical decomposition. .

The impact absorbing pad for artificial turf according to the present invention is manufactured by adding diatomaceous earth powder to a polyethylene main material. Therefore, the ultra-porous particles of diatomaceous earth contained in the shock-absorbing pad adsorb formaldehyde (formaldehyde) and VOC (volatile organic compounds), which are harmful substances in the air, to decompose themselves, and have the effect of reducing fine dust by washing with rainwater. .

In addition, the shock-absorbing pad for artificial turf according to the present invention is made of ultra-porous material by using diatomaceous earth. Therefore, it has the effect of reducing the temperature of the stadium by increasing the surface moisture content of the shock absorbing pad, and the hydrated alkaline moisture has an effect of sterilizing mold and various bacteria as an antioxidant action and inhibiting the habitat.

In addition, the impact-absorbing pad for artificial turf according to the present invention uses diatomaceous earth, which has low thermal conductivity and thermal expansion coefficient, high melting point, maintains the uprightness of the pile layer under high temperature in summer, and prevents stiffness and breakage at low temperature in winter. , It has the advantage of good adaptability to temperature change.

In addition, by manufacturing an artificial turf mat with a shock absorbing pad for artificial turf containing biomass and diatomaceous earth in the composition according to the present invention, it is possible to create an eco-friendly turf field having a complex function of reducing carbon dioxide and fine dust, It is possible to construct a stadium that provides a pleasant environment to users and contributes to the prevention of global warming.

Since the present invention can be modified in various ways and has various embodiments, specific embodiments will be illustrated and will be described in detail in the description of the invention.

However, this is not intended to limit the present invention to a specific embodiment, it should be understood to include all changes, equivalents, or substitutes included in the spirit and scope of the present invention.

The terms or words used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. In order to describe one's invention in the best way, it should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of terms can be appropriately defined.

Artificial turf including shock-absorbing pads is based on plastics (PP, PE, nylon, etc.), and can achieve a shape and color similar to that of natural turf during the molding process, and has the advantage of low production cost, but uses limited petroleum resources. In order to solve this problem, research on bioplastics, which are more eco-friendly plastics, is active in order to solve this problem.

The bioplastics are plant-derived biomass and are classified into biodegradable plastics that are 100% degraded in nature, and biomass (bio-based) plastics that solve the disadvantages of biodegradable plastics by polymerizing plant-derived biomass with existing plastics. I can.

In the present invention, in describing the above terms,'biomass and biobase' is used unified as'biomass', and when other documents are cited, they are intended to be described as expressed in the documents.

The applicant of the present invention applies a carbon-neutral plant biomass composite (product name: TGR-BBP) of'Seojin Biotech Co., Ltd.', which is a biomass specialist in order to manufacture a shock absorbing pad for artificial turf based on biomass plastic. We want to add carbon dioxide reduction performance to the shock absorbing pad for lawn.

In addition, the present applicant intends to add the ability to reduce fine dust and field temperature of the impact-absorbing pad for artificial turf by containing diatomaceous earth in the biomass plastic containing the carbon-neutral plant biomass composite.

Specific features and advantages of the present invention will become more apparent from the following description.

<Example 1> Impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust

The main material of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention is biomass plastic (Biomass Polyethylene: Bio-PE), Low Density Polyethylene (LDPE), ethylene vinyl acetate (Ethylene). Vinyl Acetate: EVA) containing a polymer mixture, based on 100 parts by weight of the polymer mixture, 1 to 20 parts by weight of calcium carbonate; 0.5 to 10 parts by weight of diatomaceous earth in powder form of 150 mesh size; 0.1 to 5 parts by weight of iron oxide; 2 to 5 parts by weight of a foaming agent, 0.05 to 2 parts by weight of a crosslinking agent; It characterized in that it contains 0.05 to 2 parts by weight of the release agent.

The polymer mixture of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention includes 5 to 30% by weight of biomass plastic, 30 to 50% by weight of low-density polyethylene (LDPE), and ethylene vinyl acetate ( EVA) characterized in that it contains 10 to 30% by weight.

The biomass plastic of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention is characterized in that it is a biomass polyethylene (Bio-PE) containing 20 to 25% by weight of a biomass composite. .

The biomass polyethylene of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention is a polymer containing linear low-density polyethylene (LLDPE) and medium-density polyethylene (MDPE) in a weight ratio of 4:1 It is characterized by being.

The composition of the present invention, when manufacturing a shock-absorbing pad for artificial turf, has a thin thickness and excellent shock absorption and dimensional stability, as well as low thermal conductivity and permanent compression rate, and can be less deformed and stable even with external stimuli. In addition, it reduces carbon dioxide, adsorbs, decomposes and cleans fine dust, controls deodorization humidity, and has excellent antibacterial properties.

Hereinafter, the impact-absorbing pad composition for artificial turf, which is applied to the present invention, for reducing carbon and collecting fine dust, will be described in detail.

1. Polymer mixture

The polymer mixture of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention includes biomass plastic (Bio-PE), low-density polyethylene (LDPE), and ethylene vinyl acetate (EVA). It is composed.

end. Biomass Plastic (Bio-PE)

The biomass plastic applied to the present invention thermo-mechanically mixes fibrous biomass selected from plant fibers to produce a thermoplastic biomass composite, and is mixed with a polymer such as polyethylene to improve mechanical properties. Type biomass plastic is manufactured.

The biomass plastic (Bio-PE) may contain 5 to 30% by weight, preferably 10 to 30% by weight, more preferably 15 to 30% by weight, based on the total weight of the polymer mixture of the composition. have.

1) Thermoplastic biomass composite

The thermoplastic biomass composite is composed of a plant-derived starch-based biomass, a plant-derived plant fiber-based biomass, a plasticizer, and an interfacial adhesion reinforcing agent.

The starch-based biomass derived from the plant is corn starch, potato starch, sweet potato starch, cassava starch, and modified starch thereof, and is selected from oxidized starch, cationic starch, crosslinkage starch, starch ester, and combinations thereof.

In addition, the starch-based biomass derived from the plant is selected from plant seeds, stems, roots, and leaves crushed flour, corn flour, rice flour, glutinous rice flour, potato flour, sweet potato flour, cassava flour, and combinations thereof.

The plant fiber-based biomass derived from the plant is wood fiber, cotton fiber, grass fiber, reed fiber, bamboo fiber, and modified products thereof, such as carboxylmethylcellulose, carboxyethylcellulose, cellulose ester, cellulose ether, and combinations thereof Is selected from.

Such a thermoplastic biomass composite is prepared by thermomechanically mixing or kneading the starch-based biomass and plant fiber-based biomass in the presence of a plasticizer and extruding it with an extruder.

The thermoplastic biomass composite of the shock-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention is composed of'TGR-BBP 'of'SeojinBiotech', a specialized company.

2) Manufacture of biomass plastic

The biomass plastic applied to the present invention is prepared including the thermoplastic biomass composite, an inorganic filler, a polymer, and an additive.

The inorganic filler is selected from calcium carbonate, talc (talc), kaolin, perlite, zeolite, clay, loess, and mixtures thereof.

The polymer is linear low density polyethylene (LLDPE), low density polyethylene (LDPE), medium density polyethylene (MDPE), high density polyethylene (HDPE), polypropylene (PP), polystyrene (PS), polyvinyl acetate (PVAc), polyamide ( PA), polycarbonate (PC), and acrylonitrile-butadiene-styrene (ABS).

The biomass plastic (Bio-PE) of the present invention is composed of linear low-density polyethylene (LLDPE) and medium-density polyethylene (MDPE) in a weight ratio of 4:1.

In addition, the additives are flow improving agents or lubricants (silicone oil, wax, calcium stearate, zinc stearate, glycerin stearate, etc.), compatibilizers (polyvinyl alcohol (PVA), ethylene vinyl acetate (EVA), ethylene vinyl alcohol). , Glycidyl methacrylate, chlorinated polyethlen (CPE), chlorinated polyvinyl chloride, etc.), binder (PVF, animal glue, polyacrylic acid solution, C ₆ H ₈ O ₂ , glycerin, polyvinyl alcohol, etc.), Plasticizers (glycerin, glycerol monostearate, sorbitol, oleic acid, linoleic acid, stearic acid, palmitic acid, lauric acid, malic acid, ethylene glycol, etc.).

The biomass plastic (Bio-PE) of the present invention is configured to contain 20 to 25% by weight of the thermoplastic biomass composite in order to specialize the shock-absorbing pad for artificial turf.

I. Low Density Polyethylene

The low-density polyethylene (LDPE) applied to the present invention is a polyethylene having many branches, low crystallinity, and a density of 0.91 to 0.93. The low-density polyethylene is slightly inferior in mechanical strength, but is excellent in workability and the like.

The low-density polyethylene (LDPE) of the present invention may be included in an amount of 30 to 50% by weight, preferably 30 to 40% by weight, based on the total weight of the polymer mixture of the composition.

All. Ethylene Vinyl Acetate

The ethylene vinyl acetate (EVA) applied to the present invention is a thermoplastic resin that combines ethylene and vinyl acetate, and is mainly used with a vinyl acetate content of 10 to 40% by weight, and when the ratio of ethylene is high, it is relatively hard, and ethylene. When the ratio of is low, it has properties similar to rubber. In general, ethylene vinyl acetate resin is flexible in transparency, adhesiveness, and flexibility, and is mainly used in the manufacture of shoe soles, coatings, electric wires, hot melts, solar cell sheets, and the like.

The ethylene vinyl acetate (EVA) of the present invention may be included in an amount of 10 to 30% by weight, preferably 15 to 30% by weight, based on the total weight of the polymer mixture of the composition.

As described above, when the biomass plastic, low density polyethylene (LDPE) and ethylene vinyl acetate (EVA) of the polymer mixture of the present invention are included in the weight ratio, the shock absorption rate and dimensional stability of the shock absorbing pad for artificial turf are It is remarkably improved, the thermal conductivity and the permanent compression rate are lowered, so that the characteristics of the shock absorbing pad can be further improved.

At this time, if the composition of the present invention is included in a manner that is less than the total weight of the polymer mixture, there may be a problem in that physical properties such as basic strength, elasticity, and durability, and impact absorption rate are significantly lowered. On the other hand, when the composition exceeds the total weight of the polymer mixture, the flexibility, processability, and usability of the shock absorbing pad for artificial turf are deteriorated, and the shock absorption rate may be deteriorated.

2. Calcium carbonate (CaCO ₃ )

_{The composition of the present invention contains calcium carbonate (CaCO 3} ) as a filler to reduce the thermal conductivity of the shock absorbing pad for artificial turf. The calcium carbonate is a colorless crystal or white solid, and can be obtained from natural marble, calcite, limestone, shells, eggshells, corals, etc., and improves the thermal stability of artificial turf.

The calcium carbonate of the present invention is characterized in that it contains 1 to 20 parts by weight, based on 100 parts by weight of the polymer mixture of the present invention.

At this time, if the calcium carbonate of the present invention is included in the amount that is less than the weight part based on the total weight of the composition, there may be a problem in that the thermal conductivity of the artificial turf may not be sufficiently reduced, thereby increasing the thermal stability of the artificial turf, based on the total weight of the composition. If it contains more than the above parts by weight, the density or rigidity of the inside of the shock absorbing pad for artificial turf is lowered, the physical properties and dimensional stability such as basic strength, elasticity, and shock absorption rate are deteriorated, and the permanent compression rate is increased. There may be.

3. Diatomaceous earth

The diatomaceous earth of the present invention is a sedimentary rock soil in which only the silicate part is fossilized after 8-10 million years of accumulation of diatoms in the sea (seawater diatomaceous earth) or under the lake (freshwater diatomaceous earth), which is a kind of phytoplankton. As plankton dies, tiny air bubbles emit pores up to 5,000 times that of activated carbon (charcoal).

In addition, diatomaceous earth has the ability to construct its own rigid skeleton structure by extracting silica from the underwater environment, and most of the diatom sedimentary rocks formed by hardening the sediments of the diatom skeleton are made of hydrated amorphous silica (SiO ₂ ), The size (particle size) is 50 to 100 µm, and it is composed of ultra-porous (fine pores) within 3 µm, and the specific surface area is 40.0 to 60.0 m ² /g.

The basic components of the diatomaceous earth are SiO ₂ 80.0 to 95.0 wt%, Al ₂ O ₃ 2.7 to 4.1 wt%, Fe ₂ O ₃ 0.5 to 1.5 wt%, MgO 0.1 to 0.3 wt%, CaO 0.05 to 0.6 wt%, K ₂ O 0.01 ~ 0.08% by weight, Na ₂ O 1.5 ~ 3.5% by weight, TiO ₂ 0.05 ~ 0.17% by weight. Through the process, some components disappear and consist mainly of silica-based components.

In addition, the diatomaceous earth of the present invention is processed into a powder form using a pulverizing device (ball mill), and 300 mesh or more is expensive and is used in the pharmaceutical field, and 100 mesh or less is used as a building material.

The diatomaceous earth of the present invention is configured to contain 0.5 to 10 parts by weight in the form of a 150 mesh size powder based on 100 parts by weight of the polymer mixture in the composition of the present invention.

At this time, the diatomaceous earth applied to the present invention is preferably added in the form of a powder of 100 to 200 mesh, most preferably 150 mesh size.

In the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention, the diatomaceous earth is _{freshwater diatomaceous earth having a silica (SiO 2} ) content of preferably 90 to 96% by weight, most preferably 93% by weight. It consists of

[Table 1] Comparison of freshwater diatomaceous earth and seawater diatomaceous earth

division Freshwater diatomaceous earth Seawater diatomaceous earth Remark Silica content 90-96% by weight 80~85% by weight Impurity content Less plenty Organic compounds, sand, iron oxide rescue Cylindrical ultra-porous Composite burglar height lowness

Referring to [Table 1], it is shown that freshwater diatomaceous earth is superior to seawater diatomaceous earth in terms of quality in terms of silica content and impurity content. The content of the silica (SiO ₂ ) influences the function of collecting fine dust, the function of hydration, the weak alkalinization of the retained moisture, the moisture absorption function, and the adaptability to temperature changes.

In the present invention, in order to manufacture an impact absorbing pad suitable for the purpose of the present invention, the silica content was composed of 90% by weight or more, and it was confirmed that freshwater diatomaceous earth satisfies the above conditions in [Table 1].

As described above, the shock absorbing pad for artificial turf of the present invention prepared by adding the freshwater diatomaceous earth having a high silica content has a function of collecting fine dust by ultra-porous particles, decomposing itself, and washing in rainwater.

In addition, the shock-absorbing pad for artificial turf of the present invention, which is manufactured by adding the freshwater diatomaceous earth having a high silica content, reduces the temperature of the stadium in summer by functioning 2 to 3 times the moisture of its own volume with high voids of ultra-porous particles. do.

In addition, the shock-absorbing pad for artificial turf of the present invention, prepared by adding the freshwater diatomaceous earth having a high silica content, has excellent hygroscopicity and has the effect of absorbing and eradicating moisture in the body and epidermis of pests, and the hydrated alkaline moisture acts as an antioxidant. By doing so, it prevents the infestation of fungi and bacteria.

In addition, the ultra-porous (fine pores) of the freshwater diatomaceous earth with high silica content forms an excellent network for each pore to maintain a pleasant playground environment by adsorbing and decomposing formaldehyde (formaldehyde) and VOC (volatile organic compounds), which are harmful substances in the air. Has the effect of doing.

4. Iron oxide (Fe ₂ O ₃ )

In the composition of the present invention, a pigment is used in order to determine the color of the shock absorbing pad for artificial turf and to express the artificial turf in a nature-friendly manner. _{Iron oxide (Fe 2} O ₃ ) is applied as a non-toxic organic or inorganic pigment to the human body. The iron oxide includes natural iron oxide, iron oxide generated in an acid recovery process of a steel mill, and iron oxide produced by roasting iron sulfate. Most of the iron oxide currently used is supplied from iron oxide generated in the steel pickling process.

The iron oxide of the present invention is configured to contain 0.1 to 5 parts by weight based on 100 parts by weight of the polymer mixture in the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention.

At this time, if the iron oxide of the present invention is included in the amount of less than the total weight of the composition, thermal conductivity may not be sufficiently reduced, thereby increasing the thermal stability of the artificial turf, and based on the total weight of the composition, the If it contains more than a part by weight, the density or rigidity of the inside of the shock-absorbing pad for artificial turf is lowered, and physical properties such as basic strength, elasticity, and shock absorption rate and dimensional stability are deteriorated, and the permanent compression rate is increased. There may be.

4. Foaming agent

The foaming agent of the present invention is a generic term for a material that is blended with plastic or rubber to create bubbles, and may include all types of known foaming agents.

As the blowing agent of the present invention, azodicarbonamide (ADDA), azobisformamkde (ABFA), azobisisobutyronitrile (AIBN), dinitrosopentamethylenetetramine (N ,N′-dinitroso Pentamethylene Tetramine: DPT), p-Tolu-enesulfonylhydrazide (TSH), pp′-oxybis(b-enzenesulfonyhydrazide), pp′-Oxybis(b-enzenesulfonyhydrazide : OBSH), ammonium carbonate, and sodium hydrogen carbonate.

The foaming agent of the present invention is 2 to 5 parts by weight, preferably 2.5 to 5 parts by weight, based on 100 parts by weight of the mixed resin polymer in the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention. 4.7 parts by weight, more preferably 3 to 4 parts by weight may be included.

At this time, the foaming agent of the present invention may have a problem in that foaming may not be sufficiently achieved when the foaming agent is included in the weight part based on the total weight of the composition, and if it is contained in excess of the weight part, the artificial There may be a problem in that the porosity in the shock absorbing pad for turf is increased, so that the strength, dimensional stability, and shock absorption rate are decreased, and the thermal conductivity and the permanent compression rate are increased, so that the stability is significantly reduced.

5. Crosslinking agent

The crosslinking agent of the present invention is capable of forming a bridge structure by crosslinking the polymer mixture including ethylene vinyl acetate, low density polyethylene, and cellulose.

The crosslinking agent of the present invention includes dicumyl peroxide, 2.5-dimethyl-2.5G (tertiary butyl) peroxide, 1.3-bis (tysi lybutyloxyisopropylene) benzene, and m-octadiazide holmate. Etc. organic peroxides are applied.

The crosslinking agent of the present invention may be included in an amount of 0.05 to 2 parts by weight based on 100 parts by weight of the polymer mixture in the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention.

At this time, when the crosslinking agent of the present invention is less than the weight part based on the total weight of the composition, the crosslinking may not be sufficient, so that the internal structure of the shock absorbing pad for artificial turf of the present embodiment may not be dense. If it is included in excess of the weight part, the crosslinking in the shock absorbing pad for artificial turf of the present invention does not proceed uniformly, so that the overall physical properties, shock absorption rate, and dimensional stability of the shock absorbing pad for artificial turf are deteriorated, and permanent There may be a problem in that the compressibility and thermal conductivity are not sufficiently lowered.

On the other hand, the foam composition of the present invention may further include a crosslinking aid. The crosslinking aid helps to increase the degree of crosslinking by promoting the crosslinking reaction. For example, the crosslinking aid of the present invention is a polyallyl compound such as triallyl isocyanurate, triallyl cyanurate, diallyl phthalate, diallyl fumarate, diallyl maleate, ethylene glycol diacrylate, ethylene It may be a poly (meth)acryloxy compound such as glycol dimethacrylate, trimethylolpropane trimethacrylate, and the like, divinylbenzene, but is not limited thereto.

The foaming composition of this embodiment may further include a release agent in addition to the polymer mixture, calcium carbonate, diatomaceous earth, iron oxide, a foaming agent, and a crosslinking agent. The release agent of the present invention is included in an amount of 0.05 to 2 parts by weight based on 100 parts by weight of the mixed resin polymer.

In addition, the composition of the present invention may be composed of an ultraviolet absorber, an antioxidant, a light stabilizer, a flame retardant, an anti-discoloration agent, a pigment, a powder, a pigment, a catalyst, an ultraviolet absorber, an antioxidant, etc. in the form of a master batch.

The impact-absorbing pad for artificial turf, which is easy to reduce carbon and collect fine dust according to the present invention, can adjust the impact absorption and resilience by adjusting the formulation of the above-described composition, and the thickness is in the form of a roll or piece of 10 to 60 mm. It can be formed as a type of pad.

In addition, the impact-absorbing pad for artificial turf, which is easy to reduce carbon and collect fine dust according to the present invention, may form a plurality of circular or other shaped holes at regular intervals through a perforation process in order to improve drainage.

The impact-absorbing pad for artificial turf that can reduce carbon and collect fine dust easily according to the present invention prepared by the above composition reduces carbon dioxide and captures and decomposes the characteristics of biomass and diatomaceous earth from plants contained in the composition. · It has the function of washing, storing moisture to reduce the temperature of the stadium, preventing mold and bacteria infestation through antioxidant activity, and absorbing and eradicating moisture in the body and epidermis of pests.

<Example 2> Method of manufacturing a shock absorbing pad for artificial turf that is easy to reduce carbon and collect fine dust

A method of manufacturing a shock-absorbing pad for artificial turf that is easy to reduce carbon and collect fine dust with the composition of <Example 1> of the present invention is as follows.

The process for manufacturing an impact-absorbing pad with the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention includes the steps of: (a) mixing the composition (S100); (b) melting and injecting the mixture (S200); (c) molding the mixture (S300); (d) drawing out the molded shock absorbing pad (S400).

In the step (S100) of mixing the composition (a) of the present invention, based on 100 parts by weight of biomass plastic containing 20 to 25% by weight of the biomass composite, 1 to 20 parts by weight of calcium carbonate and 150 mesh size It is configured to include 0.5 to 10 parts by weight of diatomaceous earth in powder form, 0.1 to 5 parts by weight of iron oxide, 2 to 5 parts by weight of a foaming agent, 0.05 to 2 parts by weight of a crosslinking agent, and 0.05 to 2 parts by weight of a release agent.

In the step (S100) of mixing the composition (a) of the present invention, a basic composition in the form of a'pellet' is prepared by mixing the biomass composite in a powder state with the diatomaceous earth and a small amount of biomass polyethylene (Bio-PE). Consists of including the steps of making.

In addition, in the step (S100) of mixing the composition (a) of the present invention, the polymer (biomass polyethylene) mixed with the basic composition in the form of a'pellet' is a linear low-density polyethylene and a medium-density polyethylene of 4:1. It consists of a weight ratio.

In addition, in the step (S100) of mixing the composition (a) of the present invention, the composition of the <Example 1> is all added together and mixed.

The step of melting and injecting the mixture (b) of the present invention (S200) is configured to melt the composition in a state of 100 to 160°C.

In the step (S300) of molding the mixture (c) of the present invention, the mixture is injected into a mold for forming a heated shock absorbing pad, and then formed by pressing the mixture at a pressure of 30 kg.

The step of (d) drawing out the molded shock absorbing pad (S400) of the present invention is configured to take out the molded shock absorbing pad from the mold.

The shock-absorbing pad for artificial turf manufactured according to the <Example 2> is withdrawn from the molding frame, and the shock-absorbing pad has a cross-sectional area of a certain standard, and contains plant-derived biomass and diatomaceous earth contained in the composition. Features of carbon dioxide reduction and the function of collecting, decomposing, and cleaning fine dust, the function of storing moisture to reduce the temperature of the stadium, the function of preventing mold and bacteria infestation through antioxidant activity, and the function of absorbing and eradicating moisture in the body and epidermis of pests. Have.

Hereinafter, a performance test of a composition containing diatomaceous earth on a biomass plastic base and an impact absorbing pad manufactured using the same so as to reduce carbon and collect fine dust according to the present invention will be described.

<Experimental Example 1> Performance test of impact absorbing pad according to the thickness (mesh) of diatomaceous earth

A. Diatomaceous earth thickness (mesh) experiment

1. Experimental design

In order to verify the effect of the composition according to the <Example 1> (hereinafter referred to as the'basic composition'), the thickness (mesh) of the powdery diatomaceous earth contained in the'basic composition' according to the present invention is classified, In the experiment, the critical significance of the thickness of the most excellent effect considering economic feasibility is examined.

2. Experimental method and results

In the'basic composition', the thickness of the diatomaceous earth powder is divided into 80, 100, 150, 200, 300 mesh, respectively, and a specimen according to each of the meshes is produced through the production process of an impact absorbing pad for artificial turf containing biomass plastic. I did.

'Measurement items' for the mixability and surface roughness of the specimen were tested.

1) Mixability

When molding the specimen in a press mold, the ease of mixing the diatomaceous earth for each mesh with the polymer mixture was tested.

2) surface roughness

The roughness of the surface of the prepared specimen was evaluated by the feeling that a worker in the production process touched it.

[Table 2] Effect analysis of shock absorbing pad according to diatomaceous earth size (mesh)

case Diatomaceous earth
(Mesh) Effect analysis by measurement item Remark Mixability Surface roughness One 80 X X ◎: Excellent
○: Good
Δ: medium
X: bad 2 100 Δ Δ 3 150 ◎ ◎ 4 200 ◎ ◎ 5 300 ◎ ◎

Provided by Yew CGR Artificial Turf Research Institute

As can be seen from [Table 2], the thickness of the diatomaceous earth powder and the effect of each measurement item were found to be inversely proportional. The composition containing diatomaceous earth of'Case 1'agglomerated during the mixing process, the impact absorbing pad was cut during the molding process of the molding press, and the surface roughness of the produced impact absorbing pad was significantly reduced. .

The experimental results show that the impact absorbing pads of'Case 2 to 5'showed better results in the measurement items than'Case 1', and the effect of each measurement item was'good and excellent' in terms of the thickness of diatomaceous earth. It was configured to be limited to the range of ~ 200 mesh.

Therefore, the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust according to the present invention has a critical significance to limit the thickness of the diatomaceous earth powder to preferably 100 to 200 mesh, most preferably 150 mesh. There is, and the shock-absorbing pad for biomass plastic artificial turf made of the composition is configured to have both durability and functionality to build an eco-friendly artificial turf field.

<Experimental Example 2> Performance test of shock absorbing pad containing diatomaceous earth

A. Hazardous substance adsorption and decomposition experiment

1. Experimental design

The effect of reducing fine dust by the <Example 1> composition was verified by the impact-absorbing pad for artificial turf (Sample A) and the impact-absorbing pad for artificial turf made of a general polyethylene material (Specimen B), which facilitates carbon reduction and fine dust collection. In order to do this, an experiment was conducted for absorption of harmful substances such as formaldehyde and hydrogen sulfide gas.

2. Experimental method and results

I) 100g of shock absorbing pads according to <Example 1>

Ii) Polyethylene shock absorbing pad 100g

Each of the above shock-absorbing pads for artificial turf was prepared in a 5 cm long specimen (slice form), placed in a 10 liter test container, and was subjected to an experiment in which formaldehyde gas and hydrogen sulfide gas were injected and measured for each time period.

[Table 3] Analysis of formaldehyde and hydrogen sulfide adsorption properties of shock absorbing pad

case Experimental gas
(ppm) Measurement by time (h) Remark 0 0.5 One 2 4 6 One Formaldehyde 20 7 5 3 2 2 Hydrogen sulfide 50 32 24 18 10 7 2 Formaldehyde 20 20 19 18 18 19 Hydrogen sulfide 50 50 48 47 47 47

Provided by Yew CGR Artificial Turf Research Institute

Looking at the experimental results in [Table 3], it can be seen that the concentration of formaldehyde and hydrogen sulfide in the experimental vessel decreases as time passes in the biomass plastic shock absorbing pad (Case 1) containing diatomaceous earth components (6 hours). After this, the lowest concentration was maintained) and the general polyethylene shock absorbing pad (Case 2) showed no change over time.

Therefore, the above experimental results show that the biomass plastic impact absorbing pad of diatomaceous earth component collects harmful gas in ultra-porous (fine pores), and the collected harmful gas is cleaned by rain through a decomposition process.

B. Mold resistance test

1. Experimental design

In order to verify the mold resistance effect of the diatomaceous earth-containing biomass plastic shock-absorbing pad according to <Example 1>, an experiment was performed with a cultured mold strain (mixed strain).

2. Experimental method and results

Ⅰ) Impact-absorbing pad specimen according to <Example 1> (slice form)

Ii) Fungal strain (mixed strain)

-Aspergillus nigel ATCC 9642

-Penicillium pinophilum ATCC 11797

-Chaetomium globosum ATCC 6205

-Gliocladium virens ATCC 9645

-Aureobasidium pullulans ATCC 15233

The fungal strain was inoculated into the shock absorbing pad specimen and cultured for 4 weeks (29.0±0.2° C., 96.7±1.0% RH environment) to observe the hyphae.

As a result of the above experiment, the state of the hyphae in the inoculated part of the test piece was not recognized.

Therefore, the above experimental results show that ultra-porous (fine pores) are formed in the biomass plastic impact-absorbing pad of diatomaceous earth, and moisture is controlled. It has been shown to have efficacy.

The impact-absorbing pad made of the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of the present invention has the following characteristics.

The shock absorbing pad for artificial turf according to the present invention is manufactured by adding biomass plastic to a polyethylene main material.

Therefore, the biomass plastic contained in the shock absorbing pad is a plant resource, microbial metabolite, and seaweed in which carbon in the atmosphere is fixed by photosynthesis, and has the effect of contributing to the prevention of global warming by not increasing the total amount of carbon dioxide during chemical decomposition. .

The impact absorbing pad for artificial turf according to the present invention is manufactured by adding diatomaceous earth powder to a polyethylene main material.

Therefore, the ultra-porous particles of diatomaceous earth contained in the shock absorbing pad adsorb formaldehyde and VOC (volatile organic compounds), which are harmful substances in the air, decompose themselves, and have the effect of reducing fine dust by washing with rain water.

In addition, the shock-absorbing pad for artificial turf according to the present invention is made of ultra-porous material by using diatomaceous earth.

Therefore, it has the effect of reducing the temperature of the stadium by increasing the surface moisture content of the shock absorbing pad, and the hydrated alkaline moisture has an effect of sterilizing mold and various bacteria as an antioxidant action and inhibiting the habitat.

In addition, the impact-absorbing pad for artificial turf according to the present invention uses diatomaceous earth, which has low thermal conductivity and thermal expansion coefficient, high melting point, maintains the uprightness of the pile layer under high temperature in summer, and prevents stiffness and breakage at low temperature in winter. , It has the advantage of good adaptability to temperature change.

In addition, by manufacturing an artificial turf mat with a shock absorbing pad for artificial turf containing biomass and diatomaceous earth in the composition according to the present invention, it is possible to create an eco-friendly turf field having a complex function of reducing carbon dioxide and fine dust, It is possible to construct a stadium that provides a pleasant environment to users and contributes to the prevention of global warming.

Claims (6)

Carbon reduction and fineness based on biomass plastic containing diatomaceous earth, which is formed as ultra-porous and has the function of adsorbing, decomposing, and washing formaldehyde and volatile organic compounds in the air and reducing the temperature of the stadium by increasing the surface moisture content. In the composition for obtaining a shock-absorbing pad for artificial turf that is easy to collect dust,
The composition comprises 0.5 to 10 parts by weight of diatomaceous earth in a powder form of 150 mesh size, based on 100 parts by weight of a polymer mixture including biomass plastic, low density polyethylene (LDPE), and ethylene vinyl acetate (EVA), and calcium carbonate 1 ~ 20 parts by weight, 0.1 to 5 parts by weight of iron oxide, 2 to 5 parts by weight of a foaming agent, 0.05 to 2 parts by weight of a crosslinking agent, and 0.05 to 2 parts by weight of a release agent, and the polymer mixture includes 5 to 30 parts by weight of a biomass plastic A biomass polyethylene containing 20 to 25% by weight of a biomass composite is included by weight%, low density polyethylene (LDPE) 30 to 50% by weight, ethylene vinyl acetate (EVA) 10 to 30% by weight, and the biomass plastic ( Bio-PE), and the biomass polyethylene is composed of linear low-density polyethylene (LLDPE) and medium-density polyethylene (MDPE) in a weight ratio of 4:1, and the diatomaceous earth is silica (SiO ₂ ) 93% by weight, Al ₂ O ₃ 2.7 to 4.1 wt%, Fe ₂ O ₃ 0.5 to 1.5 wt%, MgO 0.1 to 0.3 wt%, CaO 0.05 to 0.6 wt%, K ₂ O 0.01 to 0.08 wt%, Na ₂ O 1.5 to 3.5 wt% , TiO ₂ Impact-absorbing pad composition for artificial turf, characterized in that consisting of freshwater diatomaceous earth containing 0.05 to 0.17% by weight of carbon reduction and easy collection of fine dust.
delete delete delete delete An impact-absorbing pad for artificial turf, characterized in that it is manufactured by using the impact-absorbing pad composition for artificial turf that is easy to reduce carbon and collect fine dust of claim 1.