Preparation method of a buffer layer for artificial turf

Abstract

The present invention relates to the technical field of lawn buffering, and specifically discloses a preparation method of an artificial lawn buffer layer, which includes the following steps: taking 70-87 parts by weight of linear low-density polyethylene resin, 15-20 parts by weight of styrene-acrylic emulsion, 12-15 parts by weight of modified bentonite agent, 3-6 parts by weight of co-formulating agent, 70-90 parts by weight of sand, 5-15 parts by weight of quicklime, 2-14 parts by weight of cement, and 1-3 parts by weight of industrial salt. The lawn buffer layer of the present invention is improved and optimized by using linear low-density polyethylene resin and styrene-acrylic emulsion through a modified bentonite agent and a co-formulating agent. The modified bentonite agent is modified by stirring bentonite in a chitosan composite solution and a modified solution. The optimized bentonite has a lamellar structure and seeps water through the layer spacing, enhancing the water seepage effect. At the same time, the optimized bentonite can improve the elastic effect of the product. After modification, carbon nanotubes and nano-silica synergistically enhance the surface contact effect of water.

Description

Technical Field

[0001] The present invention relates to the technical field of lawn buffering, and particularly relates to a preparation method of an artificial lawn buffer layer. Background Art

[0002] The bases of traditional artificial lawns usually consist of a plain concrete layer, an asphalt concrete layer or a stone powder layer. The plain concrete layer and the asphalt concrete layer have good structural stability but are too hard and have no water permeability function; the stone powder layer has poor plasticity and relatively high hardness; these materials are not suitable to be directly used as the base materials for artificial lawn sports fields. The bases of artificial lawn sports fields made of these materials will result in too hard a field surface. When people carry out physical exercises or competitions on it, it will cause damage to bones and may also have other sports safety problems.

[0003] The existing lawn buffer layers have poor water seepage rates and are easily blocked by rainwater on rainy days. At the same time, their buffering performance is average, and the buffering and water seepage performances cannot be coordinated and improved. Based on this, the present invention further improves it. Summary of the Invention

[0004] Aiming at the defects of the prior art, the purpose of the present invention is to provide a preparation method of an artificial lawn buffer layer to solve the problems raised in the above background art.

[0005] The present invention adopts the following technical solutions to solve the technical problems:

[0006] The present invention provides a preparation method of an artificial lawn buffer layer, including the following steps:

[0007] Step 1: Take 70 - 87 parts by weight of linear low-density polyethylene resin, 15 - 20 parts by weight of styrene-acrylic emulsion, 12 - 15 parts by weight of modified bentonite agent, 3 - 6 parts by weight of co-ordination treatment agent, 70 - 90 parts by weight of sand, 5 - 15 parts by weight of quicklime, 2 - 14 parts by weight of cement, and 1 - 3 parts by weight of industrial salt;

[0008] Step 2: First, fully mix the raw materials in Step 1 at a mixing speed of 500 - 1000 r / min for 20 - 30 min;

[0009] Step 3: Send it into a mold for hot pressing and forming at a mold temperature of 110 - 120 °C to obtain an artificial lawn buffer layer.

[0010] Preferably, the preparation method of the modified bentonite agent is as follows:

[0011] S01: Send 10 - 20 parts of bentonite into heat treatment at 350 - 400 °C for 10 - 20 min, and then naturally cool it to room temperature;

[0012] S02: Add 1-3 parts of chitosan into 10-20 parts of hydrochloric acid solution, then add 2-5 parts of sodium dodecyl sulfate and 2-4 parts of lanthanum sulfate, and stir evenly to obtain a chitosan composite solution;

[0013] S03: Place the product of S01 in 5-7 times of the chitosan composite solution, stir well, wash with water and dry;

[0014] S04: Finally, add it to 4-6 times of the modification solution and stir for modification. After the modification is completed, wash with water again and dry to obtain a modified bentonite agent.

[0015] Preferably, the mass fraction of the hydrochloric acid solution is 5-10%.

[0016] Preferably, the rotation speed of the S04 stirring modification is 1200-1500 r / min, and the stirring time is 20-30 min.

[0017] Preferably, the preparation method of the modification solution is as follows:

[0018] Mix divinylbenzene and amino silicone oil according to a weight ratio of 1:5, then add 10-20% of dodecylphenol based on the total amount of divinylbenzene, stir at a rotation speed of 200-220 r / min for 20-30 min, and then add 1-5% of azobisisobutyronitrile based on the total amount of divinylbenzene, and continue to stir for 10-20 min. After the stirring is completed, obtain a preliminary adjustment solution;

[0019] Add the preliminary adjustment solution to the silane coupling agent according to a weight ratio of 1:5, then add 2-5% of sodium 2,3-dimercaptopropanesulfonate based on the total amount of the preliminary adjustment solution, and stir well to obtain a modification solution.

[0020] Preferably, the silane coupling agent is coupling agent KH560.

[0021] Preferably, the preparation method of the co-ordination treatment agent is as follows:

[0022] Disperse carbon nanotubes evenly in 3-5 times of deionized water, then add 2-5% of hydrochloric acid and 1-5% of sodium oxalate based on the total amount of carbon nanotubes, stir evenly, and finally add 1-5% of nano-silica based on the total amount of carbon nanotubes, stir well, wash with water and dry to obtain a co-ordination treatment agent.

[0023] Preferably, the particle size of the carbon nanotubes is 10-15 nm, and they are multi-walled carbon nanotubes.

[0024] Preferably, the particle size of the nano-silica is 2-5 nm.

[0025] Preferably, the pressure of the hot pressing and forming is 5-10 MPa.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the lawn buffer layer of the present invention, linear low-density polyethylene resin and styrene-acrylic emulsion are improved and optimized through a modified bentonite agent and a co-formulating treatment agent. The co-formulated sand, quicklime, cement, and industrial salt are used to enhance the strength stability of the product. The modified bentonite agent is prepared by stirring and modifying bentonite in a chitosan composite solution and a modified solution. The optimized bentonite has a lamellar structure, and water seepage is carried out through the layer spacing, enhancing the water seepage effect. At the same time, the optimized bentonite can improve the elastic effect of the product. After modification, carbon nanotubes and nano-silica synergistically enhance the surface contact effect of water, thereby further optimizing the water seepage efficiency. The water seepage and elastic properties of the optimized product can achieve coordinated improvement efficiency. Specific embodiments

[0028] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] A preparation method of an artificial lawn buffer layer in this embodiment includes the following steps:

[0030] Step 1: Take 70-87 parts by weight of linear low-density polyethylene resin, 15-20 parts by weight of styrene-acrylic emulsion, 12-15 parts by weight of modified bentonite agent, 3-6 parts by weight of co-formulating treatment agent, 70-90 parts by weight of sand, 5-15 parts by weight of quicklime, 2-14 parts by weight of cement, and 1-3 parts by weight of industrial salt;

[0031] Step 2: First, fully mix the raw materials in Step 1 at a mixing speed of 500-1000 r / min for 20-30 min;

[0032] Step 3: Send it into a mold for hot pressing and forming at a mold temperature of 110-120 °C to obtain an artificial lawn buffer layer.

[0033] The preparation method of the modified bentonite agent in this embodiment is as follows:

[0034] S01: Send 10-20 parts of bentonite for heat treatment at 350-400 °C for 10-20 min, and then naturally cool it to room temperature;

[0035] S02: Add 1-3 parts of chitosan to 10-20 parts of hydrochloric acid solution, then add 2-5 parts of sodium dodecyl sulfate and 2-4 parts of lanthanum sulfate, and stir evenly to obtain a chitosan composite solution;

[0036] S03: Place the product of S01 into 5 - 7 times the amount of chitosan composite solution, stir thoroughly, wash with water and dry.

[0037] S04: Finally, add it to 4 - 6 times the amount of modification solution, stir for modification, after the modification is completed, wash with water again and dry to obtain the modified bentonite agent.

[0038] In this example, the mass fraction of the hydrochloric acid solution is 5 - 10%.

[0039] In this example, the rotation speed of stirring for modification in S04 is 1200 - 1500 r / min, and the stirring time is 20 - 30 min.

[0040] The preparation method of the modification solution in this example is as follows:

[0041] Mix divinylbenzene and amino silicone oil according to a weight ratio of 1:5, then add dodecylphenol accounting for 10 - 20% of the total amount of divinylbenzene, stir at a rotation speed of 200 - 220 r / min for 20 - 30 min, then add azobisisobutyronitrile accounting for 1 - 5% of the total amount of divinylbenzene, and continue to stir for 10 - 20 min. After the stirring is completed, obtain the preliminary adjustment solution.

[0042] Add the preliminary adjustment solution to the silane coupling agent according to a weight ratio of 1:5, then add sodium dimercaptopropanesulfonate accounting for 2 - 5% of the total amount of the preliminary adjustment solution, stir thoroughly to obtain the modification solution.

[0043] The silane coupling agent in this example is coupling agent KH560.

[0044] The preparation method of the co - matching treatment agent in this example is as follows:

[0045] Disperse carbon nanotubes evenly in 3 - 5 times the amount of deionized water, then add hydrochloric acid accounting for 2 - 5% of the total amount of carbon nanotubes and sodium oxalate accounting for 1 - 5% of the total amount of carbon nanotubes, stir evenly, finally add nano - silica accounting for 1 - 5% of the total amount of carbon nanotubes, stir thoroughly, wash with water and dry to obtain the co - matching treatment agent.

[0046] The particle size of the carbon nanotubes in this example is 10 - 15 nm, and it is multi - wall carbon nanotubes.

[0047] The particle size of the nano - silica in this example is 2 - 5 nm.

[0048] The pressure for hot - pressing forming in this example is 5 - 10 MPa.

[0049] Example 1.

[0050] The preparation method of an artificial turf buffer layer in this example includes the following steps:

[0051] Step 1: Take 70 parts by weight of linear low-density polyethylene resin, 15 parts by weight of styrene-acrylic emulsion, 12 parts by weight of modified bentonite agent, 3 parts by weight of co-treatment agent, 70 parts by weight of sand, 5 parts by weight of quicklime, 2 parts by weight of cement, and 1 part by weight of industrial salt;

[0052] Step 2: Mix the raw materials in step 1 thoroughly at a mixing speed of 500 r / min and a mixing time of 20 min;

[0053] Step 3: Send it into the mold for hot pressing and molding, the mold temperature is 110℃, and the artificial turf buffer layer is obtained.

[0054] The preparation method of the modified bentonite agent of this embodiment is:

[0055] S01: 10 parts of bentonite were heat treated at 350°C for 10 minutes, and then naturally cooled to room temperature;

[0056] S02: Add 1 part of chitosan to 10 parts of hydrochloric acid solution, then add 2 parts of sodium lauryl sulfate and 2 parts of lanthanum sulfate, stir evenly to obtain a chitosan composite solution;

[0057] S03: Place the product of S01 in 5 times the volume of chitosan complex solution, stir thoroughly, wash with water and dry;

[0058] S04: Finally, add it into 4 times the modifying liquid and stir to modify it. After the modification is completed, wash it with water and dry it to obtain the modified bentonite agent.

[0059] The mass fraction of the hydrochloric acid solution in this embodiment is 5%.

[0060] The stirring speed of SO4 in this embodiment is 1200 r / min and the stirring time is 20 min.

[0061] The preparation method of the modified liquid of this embodiment is:

[0062] Divinylbenzene and amino silicone oil were mixed in a weight ratio of 1:5, and then 10% of the total amount of divinylbenzene was added to dodecylphenol, and stirred at a speed of 200 r / min for 20 minutes. Subsequently, 1% of the total amount of divinylbenzene was added to azobisisobutyronitrile, and stirring was continued for 10 minutes. After stirring was completed, a preliminary solution was obtained;

[0063] The initial adjustment liquid was added to the silane coupling agent in a weight ratio of 1:5, and then 2-5% of the total amount of the initial adjustment liquid was added with sodium dithiopropane sulfonate, and stirred thoroughly to obtain a modified liquid.

[0064] The silane coupling agent in this embodiment is coupling agent KH560.

[0065] The preparation method of the co-formulated treatment agent of this embodiment is:

[0066] The carbon nanotubes were placed in 3 times the amount of deionized water and dispersed evenly, followed by adding 2% hydrochloric acid and 1% sodium oxalate of the total amount of the carbon nanotubes and stirring evenly, and finally adding 1% nano-silica of the total amount of the carbon nanotubes and stirring thoroughly, and then washed with water and dried to obtain a coordinated treatment agent.

[0067] The carbon nanotubes in this embodiment have a particle size of 10 nm and are multi-walled carbon nanotubes.

[0068] The particle size of the nano-silicon dioxide in this embodiment is 2 nm.

[0069] The pressure of the hot press molding in this embodiment is 5 MPa.

[0070] Example 2.

[0071] The method for preparing an artificial turf buffer layer of this embodiment includes the following steps:

[0072] Step 1: Take 87 parts by weight of linear low-density polyethylene resin, 20 parts by weight of styrene-acrylic emulsion, 15 parts by weight of modified bentonite agent, 6 parts by weight of co-treatment agent, 90 parts by weight of sand, 15 parts by weight of quicklime, 14 parts by weight of cement, and 3 parts by weight of industrial salt;

[0073] Step 2: Mix the raw materials in step 1 thoroughly at a mixing speed of 1000 r / min and a mixing time of 30 min;

[0074] Step 3: Send it into the mold for hot pressing and molding, the mold temperature is 120℃, and the artificial turf buffer layer is obtained.

[0075] The preparation method of the modified bentonite agent of this embodiment is:

[0076] S01: 20 parts of bentonite were heat treated at 400°C for 20 minutes, and then naturally cooled to room temperature;

[0077] S02: Add 3 parts of chitosan to 20 parts of hydrochloric acid solution, then add 5 parts of sodium lauryl sulfate and 4 parts of lanthanum sulfate, and stir evenly to obtain a chitosan composite solution;

[0078] S03: Place the product of S01 in 7 times the volume of chitosan complex solution, stir thoroughly, wash with water and dry;

[0079] S04: Finally, add it into 6 times the modifying liquid and stir to modify it. After the modification is completed, wash it with water and dry it to obtain the modified bentonite agent.

[0080] The mass fraction of the hydrochloric acid solution in this embodiment is 10%.

[0081] The stirring speed of SO4 in this embodiment is 1500 r / min and the stirring time is 30 min.

[0082] The preparation method of the modified liquid of this embodiment is:

[0083] Divinylbenzene and amino silicone oil were mixed in a weight ratio of 1:5, and then 20% of the total amount of divinylbenzene was added to dodecylphenol, and stirred at a speed of 220 r / min for 30 minutes. Subsequently, 5% of the total amount of divinylbenzene was added to azobisisobutyronitrile, and stirring was continued for 20 minutes. After stirring was completed, a preliminary solution was obtained;

[0084] The initial adjustment liquid was added to the silane coupling agent in a weight ratio of 1:5, and then 5% of the total amount of the initial adjustment liquid was added with sodium dithiopropane sulfonate, and stirred thoroughly to obtain a modified liquid.

[0085] The silane coupling agent in this embodiment is coupling agent KH560.

[0086] The preparation method of the co-formulated treatment agent of this embodiment is:

[0087] The carbon nanotubes were placed in 5 times deionized water and dispersed evenly, and then 5% hydrochloric acid and 5% sodium oxalate were added to the carbon nanotubes and stirred evenly. Finally, 5% nano-silicon dioxide was added to the carbon nanotubes and stirred thoroughly. The mixture was then washed with water and dried to obtain a synergistic treatment agent.

[0088] The carbon nanotubes in this embodiment have a particle size of 15 nm and are multi-walled carbon nanotubes.

[0089] The particle size of the nano-silicon dioxide in this embodiment is 5 nm.

[0090] The pressure of the hot press molding in this embodiment is 10 MPa.

[0091] Example 3.

[0092] The method for preparing an artificial turf buffer layer of this embodiment includes the following steps:

[0093] Step 1: Take 80 parts by weight of linear low-density polyethylene resin, 17 parts by weight of styrene-acrylic emulsion, 13.5 parts by weight of modified bentonite agent, 4.5 parts by weight of co-treatment agent, 80 parts by weight of sand, 10 parts by weight of quicklime, 10 parts by weight of cement, and 2 parts by weight of industrial salt;

[0094] Step 2: Mix the raw materials in step 1 thoroughly at a mixing speed of 750 r / min and a mixing time of 25 min;

[0095] Step 3: Send it into the mold for hot pressing and molding at a mold temperature of 115°C to obtain the artificial turf buffer layer.

[0096] The preparation method of the modified bentonite agent of this embodiment is:

[0097] S01: Feed 15 parts of bentonite and heat-treat it at 360 °C for 15 min, then naturally cool it to room temperature;

[0098] S02: Add 2 parts of chitosan to 15 parts of hydrochloric acid solution, then add 3.5 parts of sodium dodecyl sulfate and 3 parts of lanthanum sulfate, and stir evenly to obtain a chitosan composite solution;

[0099] S03: Place the product of S01 in 6 times the amount of the chitosan composite solution, stir well, wash with water and dry;

[0100] S04: Finally, add it to 5 times the amount of the modification solution and stir for modification. After the modification is completed, wash with water again and dry to obtain a modified bentonite agent.

[0101] The mass fraction of the hydrochloric acid solution in this example is 7.5%.

[0102] The rotation speed of stirring for modification in S04 of this example is 1350 r / min, and the stirring time is 25 min.

[0103] The preparation method of the modification solution in this example is as follows:

[0104] Mix divinylbenzene and amino silicone oil in a weight ratio of 1:5, then add 15% of dodecylphenol based on the total amount of divinylbenzene, stir at a rotation speed of 210 r / min for 25 min, then add 3% of azobisisobutyronitrile based on the total amount of divinylbenzene, and continue to stir for 15 min. After the stirring is completed, obtain a preliminarily adjusted solution;

[0105] Add the preliminarily adjusted solution to the silane coupling agent in a weight ratio of 1:5, then add 3.5% of sodium 3-mercaptopropanesulfonate based on the total amount of the preliminarily adjusted solution, and stir well to obtain a modification solution.

[0106] The silane coupling agent in this example is coupling agent KH560.

[0107] The preparation method of the co-ordination treatment agent in this example is as follows:

[0108] Disperse carbon nanotubes evenly in 4 times the amount of deionized water, then add 3.5% of hydrochloric acid and 3% of sodium oxalate based on the total amount of carbon nanotubes, stir evenly, and finally add 3% of nano-silica based on the total amount of carbon nanotubes, stir well, wash with water and dry to obtain a co-ordination treatment agent.

[0109] The particle size of the carbon nanotubes in this example is 12.5 nm, and they are multi-walled carbon nanotubes.

[0110] The particle size of the nano-silica in this example is 3.5 nm.

[0111] The pressure of hot pressing and forming in this example is 7.5 MPa.

[0112] Comparative Example 1.

[0113] It is different from Example 3 in that the modified bentonite agent is not added.

[0114] Comparative Example 2.

[0115] It is different from Example 3 in that bentonite is used instead of the modified bentonite agent.

[0116] Comparative Example 3.

[0117] It is different from Example 3 in that the chitosan composite solution is not used in the preparation of the modified bentonite agent.

[0118] Comparative Example 4.

[0119] It is different from Example 3 in that lanthanum sulfate is not added in the preparation of the chitosan composite solution.

[0120] Comparative Example 5.

[0121] It is different from Example 3 in that the modified solution is not used in the preparation of the modified bentonite agent.

[0122] Comparative Example 6.

[0123] It is different from Example 3 in that the co - matching treatment agent is not used.

[0124] The main performance tests refer to the national standards of GB / T19995.1 - 2005 Requirements and Test Methods for the Use of Natural Material Sports Grounds and GB / T200033.3 - 2006 Requirements and Test Methods for the Use of Artificial Material Sports Grounds.

[0125] The products of Examples 1 - 3 and Comparative Examples 1 - 6 were subjected to performance tests;

[0126]

[0127] It can be seen from Comparative Examples 1 - 6 and Examples 1 - 3 that; when the modified bentonite agent is not added in the present invention, the water seepage rate and impact strength of the product are significantly reduced. At the same time, under the condition of 2% hydrochloric acid, the impact strength of the product is significantly reduced and the acid resistance stability is poor. Also, when bentonite is used instead of the modified bentonite agent, when the modified solution is not used in the preparation of the modified bentonite agent, when the chitosan composite solution is not used in the preparation of the modified bentonite agent, and the preparation methods of the modified bentonite agent are different, the performance effects of the products are different. The performance effect of the product prepared by the method of the present invention is the most significant. In addition, when the co - matching treatment agent is used, it can synergistically enhance the water seepage rate and impact strength of the product together with the modified bentonite agent.

[0128] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced by the present invention.

[0129] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A preparation method of an artificial turf buffer layer, characterized in that, The following steps are involved: Step 1: Take 70-87 parts by weight of linear low-density polyethylene resin, 15-20 parts by weight of styrene-acrylic emulsion, 12-15 parts by weight of modified bentonite agent, 3-6 parts by weight of co-treatment agent, 70-90 parts by weight of sand, 5-15 parts by weight of quicklime, 2-14 parts by weight of cement, and 1-3 parts by weight of industrial salt; Step 2: Mix the raw materials in step 1 thoroughly at a mixing speed of 500-1000 r / min for 20-30 min; Step 3: Send it into the mold for hot pressing and molding, the mold temperature is 110-120℃, and the artificial turf buffer layer is obtained; The preparation method of the modified bentonite agent is: S01: Heat-treat 10-20 parts of bentonite at 350-400°C for 10-20 minutes, and then cool naturally to room temperature; S02: Add 1-3 parts of chitosan to 10-20 parts of hydrochloric acid solution, then add 2-5 parts of sodium lauryl sulfate and 2-4 parts of lanthanum sulfate, and stir evenly to obtain a chitosan composite solution; S03: Place the S01 product in 5-7 times the chitosan complex solution, stir thoroughly, wash with water and dry; S04: Finally, add it to 4-6 times the modified liquid and stir to modify it. After the modification is completed, wash it with water and dry it to obtain a modified bentonite agent. The preparation method of the modified liquid is: Divinylbenzene and aminosilicone oil were mixed in a weight ratio of 1:5, and then 10-20% of the total amount of divinylbenzene was added to dodecylphenol, and stirred at a speed of 200-220 r / min for 20-30 minutes. Then, 1-5% of the total amount of divinylbenzene was added to azobisisobutyronitrile, and stirring was continued for 10-20 minutes. Stirring was completed to obtain a preliminary solution; The initial adjustment liquid is added to the silane coupling agent at a weight ratio of 1:5, and then 2-5% of the total amount of the initial adjustment liquid is added with sodium dithiopropane sulfonate, and stirred thoroughly to obtain a modified liquid; The preparation method of the co-formulated treatment agent is: The carbon nanotubes are placed in 3-5 times the amount of deionized water and dispersed evenly, followed by adding 2-5% hydrochloric acid and 1-5% sodium oxalate of the total amount of the carbon nanotubes and stirring evenly, and finally adding 1-5% nano-silicon dioxide of the total amount of the carbon nanotubes and stirring thoroughly, and then washed with water and dried to obtain a coordinated treatment agent.

2. The preparation method of an artificial turf buffer layer according to claim 1, characterized in that, The mass fraction of the hydrochloric acid solution is 5-10%.

3. The preparation method of an artificial turf buffer layer according to claim 1, characterized in that The stirring and modification speed in S04 is 1200-1500 r / min, and the stirring time is 20-30 min.

4. The preparation method of an artificial turf buffer layer according to claim 1, characterized in that, The silane coupling agent is coupling agent KH560.

5. The preparation method of an artificial turf buffer layer according to claim 1, characterized in that The carbon nanotubes have a particle size of 10-15 nm and are multi-walled carbon nanotubes.

6. The preparation method of an artificial turf buffer layer according to claim 1, characterized in that, The particle size of the nano-silicon dioxide is 2-5 nm.

7. The preparation method of an artificial turf buffer layer according to claim 1, characterized in that, The pressure of the hot pressing molding is 5-10 MPa.

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