KR102242021B1 - Anti-static artificial turf filler and a method for manufacturing the same - Google Patents

Abstract

The present invention relates to an artificial turf filler having excellent durability and antistatic function, and capable of suppressing a rise in the surface temperature. The present invention relates to an artificial turf filler, comprising: 10-40 wt% of a styrenic polymer; 1-20 wt% of an olefin-based resin; 10-40 wt% of a process oil; 1-38 wt% of an inorganic filler; 0.5-7 wt% of a polymer-based permanent antistatic agent; 1-10 wt% of a fibrous filler; and 0.1-10 wt% of a compatibilizer.

Description

Anti-static artificial turf filler and a method for manufacturing the same}

The present invention relates to an artificial turf filler excellent in antistatic effect and a method of manufacturing the same.

The artificial turf system is mainly used by filling a certain amount of silica sand and synthetic rubber filler between artificial turf piles in order to realize safety such as shock absorption and rotational resistance similar to natural turf, and a certain match mutual characteristic with the ball. .

However, artificial turf synthetic rubber fillers, which are important as functional fillers, have been transformed into eco-friendly products free from the controversy over harmful substances in conventional waste rubber fillers. It is exposed and suffers a lot of damage over time.

In addition, fillers for artificial turf generate dust due to wear due to external environment, number of times of use and change over time, and do not help to eliminate static electricity generated by friction on the surface of artificial turf.

In order to improve this problem, natural materials such as rice husk and cork are used as elastic fillers, but due to the low specific gravity, loss during use and a lack of abrasion resistance cause problems such as lowering of impact absorption performance.

Accordingly, it is necessary to develop a filler having excellent antistatic properties while maintaining an economical material and composition.

Registered Patent No. 10-1770397 (2019.12.09.)

The problem to be solved by the present invention is to provide an artificial turf filler having excellent durability, excellent antistatic function, and suppressing an increase in surface temperature.

An embodiment of the present invention is a styrene-based polymer 10 to 40% by weight, olefin resin 1 to 20% by weight, process oil 10 to 40% by weight, inorganic filler 1 to 38% by weight, polymer-based permanent antistatic agent 0.5 to 7 It is an artificial turf filler containing 1 to 10% by weight of a fibrous filler and 0.1 to 10% by weight of a compatibilizer.

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 copolymer. It may be one or more selected from the group consisting of (SEEPS) and styrene-isoprene-styrene copolymer (SIS).

The olefin-based resin may be an ethylene-based resin, a propylene-based resin, or a mixed resin thereof.

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 polymer-based permanent antistatic agent may be polyether blockamide (PEBA).

The fibrous filler may be natural fibers or non-olefin fibers.

The fibrous filler may be natural fibers, non-olefinic fibers, or mixed fibers thereof.

The mixed fibers may include natural fibers and non-olefin fibers in a weight ratio of 0.5-5:1.

The fibrous filler may have a thickness of 0.5 to 5 denier, and a length of 0.05 to 3 mm.

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 agaricic acid. .

The artificial turf filler may further include 0.1 to 10% by weight of the color master batch and 0.1 to 10% by weight of an anti-aging agent.

In another embodiment of the present invention, a polymer-based permanent antistatic agent, a fibrous filler, a compatibilizer, and an olefin-based resin are mixed and pelletized to prepare a first mixture; Preparing a second mixture by mixing the first mixture with a styrene-based polymer, a process oil, and an inorganic filler; And mixing the first mixture with the second mixture, melting in an extruder, and extruding to prepare a filler.

The present invention contains styrene-based polymers, olefin-based resins, process oils, inorganic fillers, polymer-based permanent antistatic agents, fibrous fillers, and compatibilizers in specific amounts, so that harmful substances such as heavy metals do not occur, while at the same time, durability and antistatic properties. Can improve the effect.

Hereinafter, it will be described in more detail through specific embodiments of the present invention so that those of ordinary skill in the art can easily implement the present invention. However, the present invention may be implemented in various different forms and is not limited to the embodiments described herein.

An embodiment of the present invention is a styrene polymer 10 to 40% by weight, olefin resin 1 to 20% by weight, process oil 10 to 40% by weight, inorganic filler 1 to 38% by weight, polymer-based permanent antistatic agent 0.5 to 7 It is an artificial turf filler containing 1 to 10% by weight of a fibrous filler and 0.1 to 10% by weight of a compatibilizer.

In the present invention, the styrenic polymer imparts elasticity and elastic recovery power to the filler, and thus 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 one or more 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 physical properties most similar to that of natural rubber, absorbs the process oil, and has compatibility with olefin-based resins.

이다. 에틸렌-부타디엔 연질 세그먼트는 프로세스 오일을 흡수하는 소수성의 비결정 영역이며, 유리 전이 온도 (Tg)가 약 -55

이다. 스티렌 경질 세그먼트와 에틸렌-부타디엔 연질 세그먼트 간의 상분리는 상이한 용해도 파라미터(스티렌 - 9.1, 에틸렌-부타디엔 -7.76)에 기인하며, 상분리 정도는 기계적 물성, 유변학적 특성, 내열성 등에 영향을 주기 때문에 상분리 정도가 큰 것이 유리하다.Specifically, the styrene-ethylene-butadiene-styrene (SEBS) imparts elasticity and elastic resilience, and because it is itself a block structure, it plays a role of preventing crosslinking formation during compounding (compounding). The styrene-ethylene-butadiene-styrene (SEBS) is a three-dimensional structure consisting of a styrene hard segment at both ends and an ethylene-butadiene soft segment connected between the heavy segments. The styrene-ethylene-butadiene-styrene (SEBS) has a two-phase structure in which a hard segment and a soft segment are phase-separated. Styrene hard segment is a crystalline region that is not mixed with ethylene-butadiene soft segment, which is an amorphous region, forms a physical crosslink at room temperature, gives mechanical properties (e.g., tensile strength), and has a glass transition temperature (Tg) of about 100

to be. The ethylene-butadiene soft segment is a hydrophobic amorphous region that absorbs process oil, and has a glass transition temperature (Tg) of about -55.

to be. 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 the degree of phase separation affects mechanical properties, rheological properties, and heat resistance, so the degree of phase separation is large. It is advantageous.

The content of the styrene-based polymer is 10 to 40% by weight, preferably 15 to 35% 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 deteriorated, and if it exceeds 40% by weight, it is difficult to expect an improvement in performance compared to manufacturing cost.

In the present invention, the olefin-based resin functions as a curable polymer that determines the hardness of the filler. In addition, the olefin-based polymer may be an ethylene-based resin, a propylene-based resin, or a mixed resin thereof. The olefin resin applied to the present invention is one of the curable polymers that determine the hardness, and is used to impart light resistance, fluidity, surface resistance, and mechanical properties to the filler.

The polyethylene resin includes a low-density polyethylene resin produced by a high-pressure method, an ethylene homopolymer produced by a medium-low pressure method, or a low-density, medium-density, and high-density polyethylene resin that is a copolymer of ethylene and α-olefin. The propylene-based resin includes a copolymer resin containing propylene as a main component, such as a propylene homopolymer, a propylene-ethylene random copolymer, and a propylene-ethylene block copolymer.

Artificial turf The content of the olefin resin is 1 to 20% by weight based on 100% by weight of the filler in order to satisfy the artificial turf system quality standard of grade A-1 according to the system quality standard of KS M 3888-1:2013, It is preferably 5 to 15% by weight. If the content of the olefin-based resin is less than 1% by weight, the hardness of the filler is low, and durability, etc. may be deteriorated, and if it exceeds 20% by weight, the filler has no soft elasticity and becomes stiff, so that the safety performance, impact absorption, etc. I can.

In the present invention, the process oil is added to secure processability during high-temperature extrusion and to ensure mixing 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 improves the stability of the flow and color of the filler. However, when using more than an appropriate amount, durability problems (shape deformation) occur, and when exposed to outdoors for a long period of time, due to oil bleeding, shape distortion and agglomeration may occur, and a fatal problem in heat resistance may occur. .

The content of the process oil is 10 to 40% by weight, preferably 15 to 35% by weight, based on 100% by weight of the filler. If the process oil content is less than 10% by weight, there is a problem in processing due to poor fluidity, and if it exceeds 40% by weight, a problem of oil bleeding may occur.

In the present invention, the inorganic filler is added to secure the 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 is 1 to 38% by weight, preferably 5 to 30% by weight, based on 100% by weight of the filler. If the content of the inorganic filler is less than 1% by weight, physical properties such as tensile strength may be deteriorated, and if it exceeds 38% by weight, it is difficult to implement the desired performance as inorganic materials such as abrasion resistance, durability, shape deformation, and elasticity.

The polymer-based permanent antistatic agent is intended to improve the cohesiveness of the fibrous filler while imparting an antistatic effect to the artificial turf filler.

The polymer-based permanent antistatic agent may be polyether blockamide (PEBA). The polyether block amide (PEBA) is a block copolymer thermoplastic elastomer, and may include a soft part and a hard part, and the hard part block may be based on polyamide, polyurethane, polyester, or a mixture thereof, and generally The soft part block may be based on polyether (PE), polyester, and copolymers or blends thereof.

The polyether block amide (PEBA) may be produced by polycondensation of a polyamide block having a reactive end group and a polyether block having a reactive end group, and may include PEBAX (Arkema) or VESTAMID E (Evonik Industries). .

The content of the polymer-based permanent antistatic agent is 0.5 to 7% by weight, preferably 1 to 5% by weight, based on 100% by weight of the filler. If the content of the polymer-based permanent antistatic agent is less than 0.5% by weight, the antistatic effect and the response effect of the fibrous filler may be reduced, and if it exceeds 7% by weight, the antistatic effect is excellent, but the melt balance problem and dispersibility This lowers the production efficiency, and it is difficult to expect an improvement in performance compared to the manufacturing cost.

The fibrous filler is for imparting antistatic efficacy and cohesiveness of the filler to the filler, and may be mixed with the polymer-based permanent antistatic agent to improve antistatic efficacy and cohesiveness.

The fibrous filler may be natural fibers, non-olefinic fibers, or mixed fibers thereof, the natural fibers may be coconut fibers or hemp fibers, and the non-olefinic fibers may be polyamide fibers.

In addition, the mixed fibers may contain natural fibers and non-olefinic fibers in a weight ratio of 0.5 to 5:1, and if the mixed fibers contain natural fibers and non-olefinic fibers in a weight ratio of less than 0.5:1, cohesiveness may be reduced. In addition, if the weight ratio of 5:1 is exceeded, antistatic efficacy may be deteriorated.

The fibrous filler may have a thickness of 0.5 to 5 denier, a length of 0.05 to 3 mm, preferably a thickness of 1 to 3 denier, and a length of 0.1 to 1.5 mm.

If the thickness of the fibrous filler is less than 0.5 denier or the length is less than 0.05 mm, it cannot be formed into a fibrous form, and it cannot form a network with other raw materials, so that durability and antistatic efficacy may be deteriorated, or exceed 5 denier. If the length exceeds 3 mm, the mesh part may be clogged when the artificial turf filler is extruded, resulting in poor discharge.

The content of the fibrous filler is 1 to 10% by weight, preferably 2 to 8% by weight, based on 100% by weight of the filler. If the content of the fibrous filler is less than 1% by weight, durability and antistatic efficacy may be deteriorated due to failure to form a network with other raw materials, and if it exceeds 10% by weight, durability and antistatic efficacy are excellent, but a melt balance problem And the dispersibility is lowered, the production efficiency is lowered, and it is difficult to expect an improvement in performance compared to the manufacturing cost.

In the present invention, the compatibilizer is 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 agaricic acid. It may be more than, the content of the compatibilizer is 0.1 to 10% by weight based on 100% by weight of the filler, preferably 0.5 to 5% by weight. If the content of the compatibilizer is less than 0.1% by weight, mixing between raw materials is not easy and durability, etc. may be deteriorated, and when the content of the compatibilizer is less than 0.1% by weight, the content of materials other than the compatibilizer may be lowered and desired physical properties may not be obtained.

In the present invention, the filler may further include a color masterbatch, an anti-aging agent, an antioxidant, and a flame retardant, and may contain 0.1 to 10% by weight based on 100% by weight of the filler, and preferably 0.5 to 5% by weight. I can. The kind of the color master batch, anti-aging agent, antioxidant and flame retardant is not particularly limited, and a conventional one may be used.

As described above, the present invention contains a styrene-based polymer, an olefin-based resin, a process oil, an inorganic filler, a silicone-based compound, a fibrous filler, and a compatibilizer in a specific amount, so that harmful substances such as heavy metals are not generated, and the durability is excellent and the temperature reduction effect In addition, it is possible to provide an artificial turf filler with excellent antistatic effect.

According to another aspect of the present invention, a polymer-based permanent antistatic agent, a fibrous filler, a compatibilizer, and an olefin-based resin are mixed and pelletized to prepare a first mixture; Preparing a second mixture by mixing the first mixture with a styrene-based polymer, a process oil, and an inorganic filler; And mixing the first mixture with the second mixture, melting in an extruder, and extruding to prepare a filler.

Specifically, a method of manufacturing an artificial turf filler according to the present invention will be described below.

In the present invention, the fibrous filler may be natural fibers, non-olefinic fibers, or mixed fibers thereof. When using natural fibers as the fibrous filler, it is possible to cut and manufacture natural fibers with a thickness of 0.5 to 5 denier and a length of 0.05 to 3 mm, and preferably cut natural fibers with a thickness of 1 to 3 denier and a length of 0.1 to 1.5 mm. And can be manufactured.

In addition, when non-olefin-based fibers are used as the fibrous filler, they can be spun to produce a non-olefin-based resin in a fibrous form, and after spinning, non-olefin-based fibers can be cut and manufactured in a thickness of 0.5 to 5 denier and a length of 0.05 to 3 mm. It may be, and preferably, it is possible to cut and manufacture non-olefin-based fibers with a thickness of 1 to 3 denier and a length of 0.1 to 1.5 mm.

The step of preparing the first mixture by mixing and pelletizing the polymer-based permanent antistatic agent, fibrous filler, compatibilizer, and olefin-based resin is a step for increasing dispersibility when manufacturing an artificial turf filler, and melting the olefin-based resin After that, a polymer-based permanent antistatic agent, a fibrous filler, and a compatibilizer can be mixed. The mixing may be carried out at 180 ~ 260 ℃. If the temperature during the mixing is less than 180°C, the olefin-based resin is not melted and thus mixing may be difficult. If the temperature exceeds 260°C, the temperature is too high and the olefin-based resin may be burned.

The step of preparing the second mixture by mixing the first mixture with a styrene-based polymer, a process oil, and an inorganic filler is a step for kneading main raw materials, and a color master batch and an anti-aging agent may be further mixed.

After melt-mixing the styrene-based polymer and the first mixture, a process oil and an inorganic filler are mixed. At this time, the color master batch and the anti-aging agent may be further mixed, and the mixing may be performed at 180 to 260°C. If the temperature during the mixing is less than 180°C, mixing may be difficult because the styrene-based polymer and the first mixture are not melted, and if the temperature exceeds 260°C, the temperature is too high, and the styrene-based polymer and the first mixture may be burned.

In the step of manufacturing a filler by melting and extruding the second mixture in an extruder, the extrusion may be performed at 180 to 260°C. If the extrusion temperature is less than 180°C, extrusion may not be easy, and if it exceeds 260°C, some olefin-based resins may be carbonized.

In this way, after preparing the first mixture, the first mixture is mixed with the styrene-based polymer to prepare a second mixture, so that the fibrous filler and the polymer-based permanent antistatic agent are moved together to the surface of the artificial turf filler. Accordingly, the cohesive force of the filler can be improved, and the antistatic effect can be maximized. On the other hand, in the case of manufacturing a filler by mixing the raw materials of the second mixture at the same time without first preparing the first mixture, it is difficult to move the fibrous filler and polymer-based permanent antistatic agent to the surface of the artificial turf filler, so the cohesiveness of the filler. And antistatic efficacy may be lowered.

Thereafter, the extruded filler may be extruded in a sheet form, and the extruded filler may be cut in water into a predetermined shape to be manufactured into a granular filler.

In the present invention, the mixing, extrusion, cutting, and the like may be performed by arbitrarily selecting means widely known in the art.

In addition, the shape of the artificial turf filler according to the present invention is not greatly limited.

Hereinafter, a specific example according to the present invention will be described.

Fibrous filler

Coconut fibers were prepared as a first fibrous filler having a thickness of 2 denier and a length of 0.7 mm, and polyamide (nylon 6) fibers were prepared as a second fibrous filler having a thickness of 2 denier and a length of 0.7 mm, and then coconut fiber and polyamide (nylon 6) A mixed fiber obtained by mixing the fibers in a weight ratio of 2:1 was prepared as a fibrous filler.

Example 1

14% by weight of polypropylene was added to a blender based on 100% by weight of the filler, and preheated at 200° C. for 20 minutes to melt the polypropylene. To the molten polypropylene, 1% by weight of polyether blockamide (Pebax), 2% by weight of the fibrous filler, and 1% by weight of maleic anhydride were added, stirred and mixed, and then pelletized with an extruder for composite materials. ) To prepare a first mixture in a pellet state.

Thereafter, 26% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added to the first mixture in a blender based on 100% by weight of the filler, and styrene-ethylene-butadiene-styrene (SEBS) and The first mixture was melted and mixed. _{Process oil (paraffinic oil) 23% by weight, calcium carbonate (CaCO 3} ) 30% by weight, color master batch 2% by weight as 100% by weight of filler in the molten styrene-ethylene-butadiene-styrene (SEBS) and the first mixture And 1% by weight of an anti-aging agent (TINUVIN 405) was added and stirred to prepare a second mixture.

Thereafter, the second mixture was extruded and molded at a temperature of 220° C. using an extruder. During the extrusion, the filler was extruded in a sheet form and cooled with water and cooling air to prepare a sheet-shaped artificial turf filler.

Example 2

Except for the addition of 23% by weight of styrene-ethylene-butadiene-styrene (SEBS), 3% by weight of polyether blockamide (Pebax), and 3% by weight of fibrous filler based on 100% by weight of the filler in Example 1 Then, an artificial turf filler was prepared in the same manner as in Example 1.

Example 3

Except for adding 18% by weight of styrene-ethylene-butadiene-styrene (SEBS), 5% by weight of polyether blockamide (Pebax), and 6% by weight of fibrous filler based on 100% by weight of the filler in Example 1 Then, an artificial turf filler was prepared in the same manner as in Example 1.

Comparative Example 1

14% by weight of polypropylene was added to a blender based on 100% by weight of the filler, and preheated at 200° C. for 20 minutes to melt the polypropylene. 2% by weight of the fibrous filler and 1% by weight of maleic anhydride were added to the molten polypropylene, stirred and mixed, and then pelletized with an extruder for composite materials to prepare a first mixture in a pellet state. I did.

Thereafter, 27% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added to the first mixture in a blender based on 100% by weight of the filler, and styrene-ethylene-butadiene-styrene (SEBS) and The first mixture was melted and mixed. _{Process oil (paraffinic oil) 23% by weight, calcium carbonate (CaCO 3} ) 30% by weight, color master batch 2% by weight and 100% by weight of a filler in the melted styrene-ethylene-butadiene-styrene (SEBS) and 1 mixture A second mixture was prepared by adding 1% by weight of an anti-aging agent (TINUVIN 405), stirring, and mixing.

온도에서 압출하여 성형하였다. 상기 압출 시 충진재를 시트 형태로 압출하여 수중과 냉각공기로 냉각하여, 시트 형태의 인조잔디 충진재를 제조하였다.Thereafter, the second mixture was used at 220° C. using an extruder.

It was molded by extrusion at temperature. During the extrusion, the filler was extruded in a sheet form and cooled with water and cooling air to prepare a sheet-shaped artificial turf filler.

Comparative Example 2

Artificial turf in the same manner as in Example 1, except that 26% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added and 3% by weight of a fibrous filler was added based on 100% by weight of the filler in Example 1. The filler was prepared.

Comparative Example 3

Artificial turf in the same manner as in Example 1, except that 23% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added and 6% by weight of a fibrous filler was added based on 100% by weight of the filler in Example 1. The filler was prepared.

Comparative Example 4

14% by weight of polypropylene was added to a blender based on 100% by weight of the filler, and preheated at 200° C. for 20 minutes to melt the polypropylene. 1% by weight of maleic anhydride was added to the molten polypropylene, stirred and mixed, and then pelletized with an extruder for a composite material to prepare a first mixture in a pellet state.

Thereafter, 29% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added to the first mixture in a blender based on 100% by weight of the filler, and styrene-ethylene-butadiene-styrene (SEBS) and The first mixture was melted and mixed. _{Process oil (paraffinic oil) 23% by weight, calcium carbonate (CaCO 3} ) 30% by weight, color master batch 2% by weight and 100% by weight of a filler in the melted styrene-ethylene-butadiene-styrene (SEBS) and 1 mixture A second mixture was prepared by adding 1% by weight of an anti-aging agent (TINUVIN 405), stirring, and mixing.

Thereafter, the second mixture was extruded and molded at a temperature of 220° C. using an extruder. During the extrusion, the filler was extruded in a sheet form and cooled with water and cooling air to prepare a sheet-shaped artificial turf filler.

Comparative Example 5

14% by weight of polypropylene was added to a blender based on 100% by weight of the filler, and preheated at 200° C. for 20 minutes to melt the polypropylene. After adding 12% by weight of the fibrous filler and 1% by weight of maleic anhydride to the molten polypropylene, mixing by stirring, and then pelletizing with an extruder for composite materials, a first mixture in a pellet state was prepared. I did.

Thereafter, 21% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added to the first mixture in a blender based on 100% by weight of the filler, and styrene-ethylene-butadiene-styrene (SEBS) and The first mixture was melted and mixed. _{Process oil (paraffinic oil) 23% by weight, calcium carbonate (CaCO 3} ) 30% by weight, color master batch 2% by weight and 100% by weight of filler in the melted styrene-ethylene-butadiene-styrene (SEBS) and 1 A second mixture was prepared by adding 1% by weight of an anti-aging agent (TINUVIN 405), stirring, and mixing.

Thereafter, the second mixture was extruded and molded at a temperature of 220° C. using an extruder. During the extrusion, the filler was extruded in a sheet form and cooled with water and cooling air to prepare a sheet-shaped artificial turf filler.

Comparative Example 6

14% by weight of polypropylene was added to a blender based on 100% by weight of the filler, and preheated at 200° C. for 20 minutes to melt the polypropylene. 5% by weight of polyether blockamide (Pebax) and 1% by weight of maleic anhydride were added to the molten polypropylene, mixed by stirring, and then pelletized with an extruder for composite materials, and pelletized. The first mixture was prepared.

Thereafter, 24% by weight of styrene-ethylene-butadiene-styrene (SEBS) was added to the first mixture in a blender based on 100% by weight of the filler, and styrene-ethylene-butadiene-styrene (SEBS) and The first mixture was melted and mixed. _{Process oil (paraffinic oil) 23% by weight, calcium carbonate (CaCO 3} ) 30% by weight, color master batch 2% by weight and 100% by weight of a filler in the melted styrene-ethylene-butadiene-styrene (SEBS) and 1 mixture A second mixture was prepared by adding 1% by weight of an anti-aging agent (TINUVIN 405), stirring, and mixing.

Thereafter, the second mixture was extruded and molded at a temperature of 220° C. using an extruder. During the extrusion, the filler was extruded in a sheet form and cooled with water and cooling air to prepare a sheet-shaped artificial turf filler.

division Styrenic
polymer
(SEBS) Olefin resin
(PP) process
oil weapon
filling
(CaCO3) Permanent antistatic agent
(Pebax) Fibrous
filling Compatibilizer
(Maleic anhydride) Color Master
arrangement Aging
Inhibitor Example 1 26 14 23 30 One 2 One 2 One Example 2 23 14 23 30 3 3 One 2 One Example 3 18 14 23 30 5 6 One 2 One Comparative Example 1 27 14 23 30 - 2 One 2 One Comparative Example 2 26 14 23 30 - 3 One 2 One Comparative Example 3 23 14 23 30 - 6 One 2 One Comparative Example 4 29 14 23 30 - - One 2 One Comparative Example 5 21 14 23 30 - 12 One 2 One Comparative Example 6 24 14 23 30 5 - One 2 One

Filler content for artificial turf (based on 100% by weight of filler)

Experimental example

The surface resistance of the artificial turf fillers prepared in Examples 1 to 3 and Comparative Examples 1 to 6 was measured by the following measuring method, and the results are shown in Table 2 below.

[Method of measuring surface resistance]

Measured using SRM® 110 model from Wolfgang Warmbier GmbH&Co,KG of Germany (23±2℃, 50±5% relative humidity condition)

division Test Result(Ω/sq) Example 1 3x10 ⁸ Example 2 2x10 ⁸ Example 3 7x10 ⁷ Comparative Example 1 8x10 ⁹ Comparative Example 2 5x10 ⁹ Comparative Example 3 8x10 ⁸ Comparative Example 4 7x10 ¹¹ Comparative Example 5 8x10 ⁸ Comparative Example 6 4x10 ¹⁰

Referring to Table 2, when both the permanent antistatic agent and the fibrous filler are included (Examples 1 to 3), the antistatic effect than the case where the permanent antistatic agent or the fibrous filler is not included (Comparative Examples 1 to 6) It can be confirmed that this is excellent.

Specifically, in the case where the content of the fibrous filler is 2% by weight or 3% by weight (Examples 1 and 2, Comparative Examples 1 and 2), antistatic in case of further including a permanent antistatic agent (Examples 1 and 2) The efficacy was better.

As described above, in the case of the artificial turf filler according to the present invention, as can be seen in the experimental example, by including a styrene-based polymer, an olefin-based resin, a process oil, an inorganic filler, a permanent antistatic agent, a fibrous filler, and a compatibilizer in a specific amount. It can exhibit excellent antistatic efficacy.

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

Therefore, the scope of the present invention is indicated by the claims to be described later rather than the detailed description, and all changes or modified forms derived from the meaning, scope and equivalent concepts of the claims are included in the scope of the present invention. It must be interpreted.

Claims (13)

15 to 35% by weight of styrene polymer, 5 to 15% by weight of olefin resin, 15 to 35% by weight of process oil, 5 to 30% by weight of inorganic filler, 1 to 5% by weight of polymer-based permanent antistatic agent, fibrous filler 2 As an artificial turf filler containing ~8% by weight and 0.5-5% by weight of a compatibilizer,
The polymer-based permanent antistatic agent is polyether blockamide (PEBA),
The fibrous filler is artificial turf filler, characterized in that the mixed fibers of natural fibers and non-olefin-based fibers. The method of claim 1,
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 copolymer. Artificial turf filler, characterized in that at least one selected from the group consisting of (SEEPS) and styrene-isoprene-styrene copolymer (SIS). The method of claim 1,
The olefin-based resin is an artificial turf filler, characterized in that an ethylene-based resin, a propylene-based resin, or a mixed resin thereof. The method of claim 1,
The process oil is an artificial turf filler, characterized in that at least one selected from the group consisting of paraffinic, naphthenic and aromatic process oils. The method of claim 1,
The inorganic filler is artificial turf filler, characterized in that at least one selected from the group consisting of calcium carbonate, activated carbon and mica. delete delete The method of claim 1,
The mixed fiber is an artificial turf filler, characterized in that it comprises a natural fiber and a non-olefinic fiber in a weight ratio of 0.5 to 5: 1. The method of claim 1,
The natural fiber is coconut fiber or hemp fiber, and the non-olefin-based fiber is an artificial turf filler, characterized in that the polyamide fiber. The method of claim 1,
The fibrous filler is an artificial turf filler, characterized in that the thickness is 0.5 ~ 5 denier, the length is 0.05 ~ 3 mm. The method of claim 1,
The compatibilizer is 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 agaricic acid. Artificial turf filler. The method of claim 1,
The artificial turf filler further comprises 0.1 to 10% by weight of the color master batch and 0.1 to 10% by weight of an anti-aging agent. Mixing a polymer-based permanent antistatic agent, a fibrous filler, a compatibilizer, and an olefin-based resin, and pelletizing to prepare a first mixture;
Preparing a second mixture by mixing the first mixture with a styrene-based polymer, a process oil, and an inorganic filler; And
Melting and extruding the second mixture in an extruder to prepare a filler;
As a method for manufacturing an artificial turf filler comprising a,
The filler is 15 to 35% by weight of styrene polymer, 5 to 15% by weight of olefin resin, 15 to 35% by weight of process oil, 5 to 30% by weight of inorganic filler, 1 to 5% by weight of polymer-based permanent antistatic agent, Including 2 to 8% by weight of a fibrous filler and 0.5 to 5% by weight of a compatibilizer,
The polymer-based permanent antistatic agent is polyether blockamide (PEBA),
The fibrous filler is an artificial turf filler manufacturing method, characterized in that the mixed fibers of natural fibers and non-olefin-based fibers.