Adhesive composition for artificial turf, artificial turf and preparation method of adhesive composition

Abstract

The invention discloses an adhesive composition for an artificial turf, the artificial turf and a preparation method of the artificial turf, and belongs to the technical field of artificial turfs. Comprising the following components: 10-50% of amorphous alpha-polyolefin emulsion or modified amorphous alpha-polyolefin emulsion of which the average particle size of latex particles is less than 3 microns, and 40-60% of solid content; the average particle size of latex particles of the functional resin emulsion is smaller than 3 microns, and the solid content of the functional resin emulsion is 40-60%; 0.1 to 10% of a surfactant; and 0-80% of an inorganic filler. The composition is a water-based system, the requirement for the environment is low in the gum production process, the gum-coated lawn bottom back has excellent bonding strength, the bonding strength of an internal single grass yarn, which is most difficult to permeate, of an artificial lawn is still kept good in a high-temperature and high-humidity environment after hot water aging, the thermal stability of the composition is good, and the problems of shrinkage and bulging are not prone to occurring.

Description

Technical Field

[0001] The present invention relates to the technical field of artificial turf, and more particularly to an adhesive composition for artificial turf, artificial turf and a preparation method thereof. Background Art

[0002] Artificial turf mainly consists of three parts, namely, synthetic grass fibers that imitate grass blades, the base fabric for implanting synthetic fibers, and the adhesive layer for fixing. After more than half a century of development, the grass fibers have evolved from nylon used in the first generation, polypropylene used in the second generation, and polyethylene used in the third generation. The softness of the feel, appearance, and sports performance have become increasingly close to natural grass, and have been widely accepted by users. When artificial turf is laid on sports fields such as soccer, American football, and hockey, there are very strict requirements on the bonding performance of the adhesive layer and the dimensional stability of the turf. How to fix the grass fibers, keep them from falling off for a long time, and keep the turf's size stable and not deformed or bulging is a very important performance.

[0003] At present, artificial turf manufacturers generally use styrene-butadiene glue and polyurethane glue as the adhesive layer, and some artificial turf products use ethylene-vinyl acetate hot melt adhesive. The base resin used in styrene-butadiene glue is butadiene-styrene copolymer, which is mainly produced by emulsion polymerization. A certain amount of emulsifier is added during the polymerization process. In order to improve the adhesion, a considerable part of the products will be modified by adding a certain amount of a third monomer containing a carboxylic acid unit. Due to the presence of hydrophilic emulsifiers and carboxylic acid monomers, the water resistance of styrene-butadiene glue is poor and cannot meet the use requirements of sports venues with higher strength. Two-component polyurethane glue is favored for its excellent bonding strength and good water and weather resistance, but it has too high environmental requirements for the production process, especially on rainy days or in summer when the humidity is high. The moisture in the air will react with the isocyanate monomer in the glue, destroying the original structure of the overall adhesive layer, producing artificial turf with poor bonding strength, and burying hidden dangers for the quality in the later stage. Ethylene-vinyl acetate hot melt adhesive has also received a certain degree of attention due to its environmental advantages. However, most of this type of adhesive adopts the cast process. The hot melt system has high viscosity and is difficult to penetrate into the grass fibers, resulting in poor pull-out performance of single grass fibers. In addition, this type of adhesive has poor heat resistance, which makes the lawn have dimensional stability problems after long-term use.

[0004] With the gradual popularization of artificial turf, more and more sports venues around the world have begun to be laid, which puts higher requirements on the performance of its adhesive layer in extreme environments. In recent years, we have found that in some areas with strong demand for sports, after rainy days, the entire lawn is still in a high temperature and high humidity environment after being directly exposed to the sun, and sports enthusiasts begin to play football on the field. At this time, the mechanical properties of the lawn's adhesive layer are the weakest, and long-term exercise will cause the grass to fall off. In addition, artificial turf is prone to stability problems such as shrinkage and bulging in extreme environments for a long time. The existing artificial turf adhesive technology generally has the above-mentioned problems at both the production end and the product use end. Therefore, it is necessary to develop a new type of artificial turf adhesive to meet the growing needs of the market.

[0005] Therefore, how to develop an adhesive composition for artificial turf, artificial turf and a preparation method thereof is a technical problem that those skilled in the art urgently need to solve. Summary of the invention

[0006] In view of this, the present invention provides an adhesive composition for artificial turf, artificial turf and a preparation method thereof.

[0007] In order to achieve the above object, the present invention adopts the following technical solution:

[0008] An adhesive composition for artificial turf, comprising the following components by mass percentage:

[0009] 10-50% of amorphous α-polyolefin emulsion with an average particle size of latex particles less than 3 μm, and a solid content of the amorphous α-polyolefin emulsion of 40-60%;

[0010] The average particle size of latex particles is less than 5-40% of the functional resin emulsion of 3 μm, and the solid content of the functional resin emulsion is 40-60%;

[0011] Surfactant 0.1-10%;

[0012] Inorganic filler 0-80%;

[0013] The modified monomer of the modified amorphous α-polyolefin emulsion includes one or more of acrylic acid, methacrylic acid, ethylene acrylic acid, glycidyl methacrylate or maleic anhydride;

[0014] The base resin modified amorphous α-polyolefin resin in the modified amorphous α-polyolefin emulsion comprises 0.1-10% of modified monomer structural units according to mass percentage.

[0015] The beneficial effects of the present invention are as follows: firstly, the adhesive composition of the present invention introduces an amorphous α-polyolefin emulsion, and the olefin segments in the emulsion can generate sufficient interface bonding strength to the polyolefin grass yarn during the later curing. At the same time, the functional resin emulsion is introduced into the composition, which can ensure that the viscosity of the system is reduced during melt bonding, thereby ensuring sufficient wetting of the substrate, and providing a basis for forming an ideal bonding strength at the interface;

[0016] Secondly, the adhesive composition of the present invention selects suitable surfactants, emulsion particle size and emulsion solid content, which ensures good permeability of the entire composition system when back-adhesive, and provides a basis for improving the mechanical properties of the most difficult to penetrate internal single grass fibers under extreme environments;

[0017] Thirdly, in order to further improve the bonding strength, the adhesive composition of the present invention can also be matched with an inorganic filler with a high thermal conductivity coefficient in the selection of fillers, so that the adhesive of this water-based system can fully melt-bond the single grass strands at the innermost part of the whole grass strands under the existing back-adhesive process, thereby obtaining good mechanical properties;

[0018] Finally, the main resin used in the adhesive composition of the present invention is an amorphous α-polyolefin formed by the polymerization reaction of ethylene, propylene and 1-butene. Due to the introduction of propylene monomer, compared with the existing ethylene-vinyl acetate hot melt adhesive, it can provide greater help in the dimensional stability of the lawn.

[0019] Through the synergistic effect of the above aspects, the adhesive composition of the present invention can achieve a good balance between the pull-out force and dimensional stability of the innermost single grass fiber of the backing of the artificial turf under extreme environments; at the same time, the preparation method of the artificial turf containing the adhesive composition of the present invention is simple, not restricted by the environment, and can be continuously produced using the existing production line.

[0020] The composition is a water-based system with low environmental requirements during the adhesive production process. The turf backing after adhesive bonding has excellent bonding strength, and the bonding strength of the inner single grass fibers of the artificial turf, which are the most difficult to penetrate, is still good in a high temperature and high humidity environment after hot water aging. At the same time, it has good thermal stability and is not prone to shrinkage and bulging problems during long-term use.

[0021] Furthermore, the adhesive composition for artificial turf includes the following components by mass percentage:

[0022] 20-40% of amorphous α-polyolefin emulsion having an average particle size of latex particles less than 3 μm;

[0023] 10-30% of the functional resin emulsion with an average particle size of latex particles less than 3 μm;

[0024] Surfactant 3-6%;

[0025] Inorganic filler 25-65%.

[0026] Furthermore, the matrix resin amorphous α-polyolefin in the above amorphous α-polyolefin emulsion is prepared by polymerization of ethylene, propylene and 1-butene;

[0027] The matrix resin modified amorphous α-polyolefin in the modified amorphous α-polyolefin emulsion is obtained by grafting modified amorphous α-polyolefin with modified monomers.

[0028] Furthermore, the preparation method of the above-mentioned amorphous α-polyolefin emulsion or modified amorphous α-polyolefin emulsion comprises the following steps:

[0029] Deionized water, emulsifier and amorphous α-polyolefin resin or maleic anhydride modified amorphous α-polyolefin resin with a modified monomer structural unit content of 0.1-10% are added into a reaction kettle, stirring is started, and the stirring speed is adjusted to 50-150rpm, the temperature is raised to 90-150°C, and at the same time, a dispersing device is started, the speed of the dispersing disk is adjusted to 5000-15000rpm, and the temperature is kept for 10-30min, then an emulsifying device is started, the speed of the emulsifying head is adjusted to 10000-30000rpm, and the temperature is kept for 2-6h, and the material is cooled to 40-60°C and discharged to obtain an amorphous α-polyolefin emulsion or amorphous α-polyolefin resin emulsion modified by maleic anhydride.

[0030] Furthermore, the average particle size of the latex particles in the amorphous α-polyolefin emulsion or modified amorphous α-polyolefin emulsion is 0.05-2 μm.

[0031] Furthermore, the amorphous α-polyolefin emulsion is prepared from a base resin by a resin emulsification method.

[0032] Furthermore, the functional resin emulsion is one or more of terpene resin emulsion, rosin resin emulsion or petroleum resin emulsion.

[0033] Furthermore, the functional resin emulsion is a petroleum resin emulsion.

[0034] Furthermore, the above-mentioned rosin resin emulsion is one or both of rosin glycerol ester emulsion and rosin pentaerythritol ester emulsion, and the above-mentioned petroleum resin emulsion is one or more of C5 aliphatic petroleum resin emulsion, C9 aromatic petroleum resin emulsion, C5-C9 copolymer petroleum resin emulsion, dicyclopentadiene (DCPD) alicyclic petroleum resin emulsion or hydrogenated modified petroleum resin emulsion.

[0035] Furthermore, the average particle size of the latex particles in the functional resin emulsion is 0.05-2 μm.

[0036] Furthermore, the functional resin emulsion is prepared by a resin emulsification method.

[0037] Furthermore, the preparation method of the functional resin emulsion as C5 aliphatic petroleum resin emulsion comprises the following steps:

[0038] Add deionized water, emulsifier and C5 aliphatic petroleum resin into the reactor, start stirring, and adjust the stirring speed to 50-150rpm, raise the temperature to 70-135℃, start the dispersion device at the same time, adjust the dispersion disk speed to 5000-15000rpm, keep warm for 10-30min, then start the emulsification device, adjust the emulsification head speed to 8000-25000rpm, continue to keep warm for 2-5h, cool to 40-60℃ and discharge to obtain C5 aliphatic petroleum resin emulsion.

[0039] Furthermore, the above-mentioned surfactant is one or more of anionic surfactant, cationic surfactant or nonionic surfactant.

[0040] Furthermore, the above-mentioned surfactant is an anionic surfactant and a nonionic surfactant.

[0041] Furthermore, the above-mentioned anionic surfactant is one or more of potassium rosin acid, potassium oleate, sodium polyacrylate, fatty alcohol polyoxyethylene ether sulfate, sodium α-olefin sulfonate, sodium dodecyl sulfate or sodium dodecylbenzene sulfonate, the above-mentioned cationic surfactant is one or more of dodecyl ammonium chloride, hexadecyltrimethylammonium bromide or hexadecylpyridinium quaternary ammonium salt, and the above-mentioned nonionic surfactant is one or more of polyoxyethylene ether, castor oil polyoxyethylene ether, polyethylene glycol, Span 80, Tween 80 or Tween 20.

[0042] Furthermore, the inorganic filler is one or more of calcium carbonate, mica, barium sulfate, aluminum hydroxide, magnesium hydroxide, talc, wollastonite, glass beads, silicon dioxide or silicon carbide.

[0043] Furthermore, the inorganic filler is one or more of calcium carbonate, aluminum hydroxide, silicon dioxide or silicon carbide.

[0044] Furthermore, the above-mentioned adhesive composition for artificial turf also includes one or more of a color paste, a defoamer or a thickener.

[0045] The present invention also provides a method for preparing an adhesive composition for artificial turf, comprising the following steps:

[0046] (1) weighing various raw materials according to the above-mentioned adhesive composition for artificial turf;

[0047] (2) The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred to obtain the above-mentioned adhesive composition for artificial turf.

[0048] Beneficial effects of the present invention: The preparation method of the adhesive composition for artificial turf of the present invention has a simple process and is conducive to industrial application.

[0049] Furthermore, in step (2), the stirring speed is 400-600 rpm, and the stirring time is 30-60 min.

[0050] The present invention also provides an artificial turf, comprising the above-mentioned adhesive composition for artificial turf, artificial grass yarns and a base fabric, wherein the above-mentioned artificial grass yarns are tufted on the base fabric, and the adhesive backing surface of the above-mentioned base fabric is coated with the above-mentioned adhesive composition for artificial turf.

[0051] The present invention also provides a method for preparing an artificial turf, comprising the following steps:

[0052] 1) melt-extruding polyethylene and / or polypropylene, drawing and heat-setting to obtain artificial turf yarn;

[0053] 2) Tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0054] 3) The above-mentioned adhesive composition for artificial turf is uniformly coated on the adhesive backing surface of the obtained semi-finished artificial turf, and then dried to obtain the above-mentioned artificial turf.

[0055] Beneficial effects of the invention: The method for preparing artificial turf of the invention has simple process and is conducive to industrial application.

[0056] Furthermore, in step 1), the melt extrusion temperature is 160-270°C; the drawing temperature is 80-120°C, the drawing ratio is 3-7, the heat setting temperature is 80-120°C, and the shrinkage ratio is 0.75-0.95.

[0057] Further, in step 3), the amount of adhesive applied to the artificial turf adhesive composition is 500-1500 kg / m 2 .

[0058] Furthermore, in step 3), the drying temperature is 100-150° C. and the drying time is 8-14 min. DETAILED DESCRIPTION

[0059] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0060] In the embodiments of the present invention and the comparative examples:

[0061] Preparation method of amorphous α-polyolefin emulsion or maleic anhydride modified amorphous α-polyolefin emulsion:

[0062] According to the material ratio in Table 1 below, add amorphous α-polyolefin resin or maleic anhydride modified amorphous α-polyolefin resin, emulsifier, auxiliary agent and deionized water into the reactor, start stirring, and adjust the stirring speed to 100rpm, heat up according to the process parameters in Table 1, start the dispersion device at the same time, set the dispersion disk speed according to the process parameters in the table below, keep warm for 20min, then start the emulsification device, set the emulsification head speed according to the process parameters in the table below, continue to keep warm for 4h, cool to 40℃ and discharge, and obtain amorphous α-polyolefin emulsion or maleic anhydride modified amorphous α-polyolefin emulsion. The amorphous α-polyolefin emulsions with D50=1μm and different solid contents in the embodiments and comparative examples are obtained by diluting the amorphous α-polyolefin emulsion with a solid content of 65% in Table 1 below with water.

[0063] The materials in Table 1 below are amorphous α-polyolefin resins prepared by polymerization of ethylene, propylene and 1-butene. The resin raw materials were purchased from Evonik Specialty Chemicals (Shanghai) Co., Ltd. with a brand name of EP V2094.

[0064] Maleic anhydride modified amorphous α-polyolefin resin is prepared by the following method:

[0065] According to parts by weight, 100 parts of EP V2094 resin, 0.05 parts of diisopropyl peroxide and 0.01 parts of polydimethylsiloxane are mixed uniformly and placed in a mixing zone of a twin-screw extruder, and the temperatures of the mixing zone, grafting zone and termination zone of the twin-screw extruder are set to 170° C., 245° C. and 170° C., and the screw speed is 300 rpm; 2 parts of maleic anhydride monomer are added to the mixing zone, 0.5 parts of antioxidant 1010 are added to the termination zone, high-purity nitrogen is introduced into the mixing zone and the termination zone of the extruder at a pressure of 0.5 mPa, and after the reaction is completed, extrusion granulation is performed to obtain a maleic anhydride modified amorphous α-polyolefin resin.

[0066] Table 1

[0067]

[0068] The functional resin emulsion in the embodiments and comparative examples of the present invention is C5 aliphatic petroleum resin emulsion, and the preparation method is:

[0069] According to the material ratio in Table 2 below, C5 aliphatic petroleum resin, emulsifier and deionized water are added to the reactor respectively, stirring is started, and the stirring speed is adjusted to 100rpm, and the temperature is increased according to the process parameters in Table 2. At the same time, the dispersion device is started, and the dispersion disk speed is set according to the process parameters in Table 2 below, and the temperature is kept for 20 minutes, and then the emulsification device is started, and the emulsification head speed is set according to the process parameters in the table below, and the temperature is kept for 4 hours. Cool to 40°C and discharge to obtain C5 aliphatic petroleum resin emulsion. In the embodiments and comparative examples, D50=1μm, the C5 aliphatic petroleum resin emulsions with different solid contents are obtained by diluting the C5 aliphatic petroleum resin emulsion with a solid content of 65% in Table 2 below with water.

[0070] Table 2

[0071]

[0072] Preparation of styrene-butadiene adhesive composition:

[0073] The following components were weighed according to mass percentage: 48% styrene-butadiene emulsion (solid content 50%), 48% calcium carbonate, 2% polyacrylic acid dispersant, 1% black pulp, and 1% silicone defoamer;

[0074] The above components were added into a stirring kettle, the stirring device was turned on, and the stirring speed was adjusted to 500 rpm and maintained for 40 minutes to obtain a uniformly mixed styrene-butadiene adhesive composition.

[0075] Preparation of two-component polyurethane adhesive composition:

[0076] The following components were weighed according to mass percentage: 13% polyether triol (molecular weight 5000), 12% polyether diol (molecular weight 800), 1.3% 1,4-butanediol, 0.07% triethylenediamine, 0.13% nickel diacetylacetonate, 0.7% black paste, and 54% calcium carbonate;

[0077] The above components were added into a stirring kettle, the stirring device was turned on, and the stirring speed was adjusted to 400 rpm and maintained for 15 minutes to obtain component A of the two-component polyurethane adhesive composition. 18.8% of isocyanate component B was added before the artificial turf backing glue was prepared, and the stirring speed was adjusted to 800 rpm and maintained for 1 minute to obtain a two-component polyurethane adhesive composition.

[0078] Ethylene-vinyl acetate hot melt adhesive is used to prepare:

[0079] According to the mass percentage, 50.8% ethylene-vinyl acetate resin, 35.5% rosin resin, 10.2% paraffin, 2.5% cyclohexane oil and 1% antioxidant 1010 were added to a mixer and mixed evenly. The temperature was set to 100°C, the speed was 50 rpm, and the mixing time was 40 min. After the extrusion, it was extruded by a twin-screw extruder, cooled and granulated to obtain ethylene-vinyl acetate hot melt adhesive.

[0080] The preparation method of artificial turf yarn in the embodiments and comparative examples of the present invention is as follows: polyethylene is melt-extruded at a melt extrusion temperature of 220° C., drawn and heat-set at a drawing temperature of 97° C., a drawing ratio of 5, a heat-setting temperature of 99° C., and a retraction ratio of 0.8 to obtain artificial turf yarn;

[0081] In the examples and comparative examples of the present invention, the adhesive composition for artificial turf is uniformly coated on the adhesive backing surface of the obtained semi-finished artificial turf, and then dried to obtain the artificial turf. The drying temperature is 125° C. and the drying time is 12 minutes.

[0082] Example 1

[0083] The method for preparing artificial turf comprises the following steps:

[0084] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0085] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0086] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0087] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0088] Example 2

[0089] The method for preparing artificial turf comprises the following steps:

[0090] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic fillers of 45% calcium carbonate and 5% silicon carbide;

[0091] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0092] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0093] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0094] Example 3

[0095] The method for preparing artificial turf comprises the following steps:

[0096] (1) Weigh the following components by mass percentage: 30% of amorphous α-polyolefin emulsion modified with latex particles D50=1 μm (solid content 50%), a matrix resin of amorphous α-polyolefin modified with maleic anhydride, comprising 1.3% of maleic anhydride structural units by mass percentage; 15% of a functional resin emulsion with latex particles D50=1 μm (solid content 50%); a surfactant of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; and an inorganic filler of 50% calcium carbonate;

[0097] The maleic anhydride modified amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for a stirring time of 40 minutes to obtain an adhesive composition for artificial turf;

[0098] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0099] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0100] Example 4

[0101] The method for preparing artificial turf comprises the following steps:

[0102] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=2 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0103] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0104] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0105] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0106] Example 5

[0107] The method for preparing artificial turf comprises the following steps:

[0108] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=2 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0109] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0110] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0111] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0112] Example 6

[0113] The method for preparing artificial turf comprises the following steps:

[0114] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 40%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0115] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0116] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0117] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0118] Example 7

[0119] The method for preparing artificial turf comprises the following steps:

[0120] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 60%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0121] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0122] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0123] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0124] Example 8

[0125] The method for preparing artificial turf comprises the following steps:

[0126] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 40%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0127] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0128] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0129] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0130] Example 9

[0131] The method for preparing artificial turf comprises the following steps:

[0132] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 60%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0133] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0134] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0135] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0136] Example 10

[0137] The method for preparing artificial turf comprises the following steps:

[0138] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); 5% sodium dodecyl sulfate as a surfactant, and 50% calcium carbonate as an inorganic filler;

[0139] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0140] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0141] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0142] Embodiment 11

[0143] The method for preparing artificial turf comprises the following steps:

[0144] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); 5% castor oil polyoxyethylene ether as surfactant; and 50% calcium carbonate as inorganic filler;

[0145] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0146] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0147] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0148] Examples 12-19

[0149] According to Example 1, except for the different mass percentages of amorphous α-polyolefin emulsion, C5 aliphatic petroleum resin emulsion, sodium lauryl sulfate, castor oil polyoxyethylene ether, and calcium carbonate, the other raw materials, steps, and parameters are the same as those in Example 1.

[0150] Table 3 Raw material composition ratio table

[0151]

[0152] Comparative Example 1

[0153] The method for preparing artificial turf comprises the following steps:

[0154] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0155] (2) The styrene-butadiene adhesive composition is evenly coated on the adhesive surface of the obtained artificial turf semi-finished product, with the adhesive amount being 1000 kg / m 2 , and then dried to obtain artificial turf.

[0156] Comparative Example 2

[0157] The method for preparing artificial turf comprises the following steps:

[0158] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0159] (2) The two-component polyurethane adhesive composition is evenly coated on the adhesive surface of the obtained artificial turf semi-finished product, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0160] Comparative Example 3

[0161] The method for preparing artificial turf comprises the following steps:

[0162] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0163] (2) The existing ethylene-vinyl acetate hot melt adhesive is evenly coated on the adhesive surface of the obtained artificial turf semi-finished product through a casting process, and the adhesive amount is 1000 kg / m 2 , and then dried to obtain artificial turf.

[0164] Comparative Example 4

[0165] The method for preparing artificial turf comprises the following steps:

[0166] (1) Weigh the following components according to mass percentage: 47% amorphous α-polyolefin emulsion (solid content 50%) with latex particles D50=1 μm; 4.4% sodium lauryl sulfate and 1.6% castor oil polyoxyethylene ether as surfactants; and 47% calcium carbonate as inorganic filler;

[0167] The amorphous α-polyolefin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0168] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0169] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0170] Comparative Example 5

[0171] The method for preparing artificial turf comprises the following steps:

[0172] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 20% functional resin emulsion with latex particles D50=1 μm (solid content 50%); inorganic filler is 50% calcium carbonate;

[0173] The amorphous α-polyolefin emulsion, the functional resin emulsion and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for a stirring time of 40 minutes to obtain an adhesive composition for artificial turf;

[0174] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0175] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0176] Comparative Example 6

[0177] The method for preparing artificial turf comprises the following steps:

[0178] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=4 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0179] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0180] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0181] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0182] Comparative Example 7

[0183] The method for preparing artificial turf comprises the following steps:

[0184] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=4 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0185] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0186] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0187] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0188] Comparative Example 8

[0189] The method for preparing artificial turf comprises the following steps:

[0190] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 35%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0191] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0192] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0193] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2, and then dried to obtain artificial turf.

[0194] Comparative Example 9

[0195] The method for preparing artificial turf comprises the following steps:

[0196] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 65%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0197] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0198] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0199] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0200] Comparative Example 10

[0201] The method for preparing artificial turf comprises the following steps:

[0202] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 35%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0203] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0204] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0205] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0206] Comparative Example 11

[0207] The method for preparing artificial turf comprises the following steps:

[0208] (1) Weigh the following components according to mass percentage: 30% amorphous α-polyolefin emulsion with latex particles D50=1 μm (solid content 50%); 15% functional resin emulsion with latex particles D50=1 μm (solid content 65%); surfactants of 4% sodium lauryl sulfate and 1% castor oil polyoxyethylene ether; inorganic filler of 50% calcium carbonate;

[0209] The amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred at a stirring speed of 500 rpm for 40 minutes to obtain an adhesive composition for artificial turf;

[0210] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0211] (3) The adhesive composition for artificial turf is evenly coated on the adhesive surface of the obtained semi-finished artificial turf, with the adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0212] Table 4 Raw material particle size parameters

[0213]

[0214] Table 5 Raw material solid content parameter table

[0215]

[0216] Effect Experiment

[0217] Evaluation method for single-root pull-out force performance at high temperature and high humidity after hot water aging:

[0218] The specific method is to cut a 20cm×20cm newly prepared test sample from the artificial turf, and use 10 clamps to clamp the innermost single grass strand of the whole cluster of grass strands. Because this grass strand is at the innermost part, it often has poor mechanical properties due to the penetration of the adhesive, and is also the part that is most likely to fall off during later use. The clamping positions are evenly distributed in different areas of the test sample, and the sample is placed in a water bath at a temperature of (70±2)℃ for 14 days. After the end, the water bath temperature is adjusted to (50±2)℃ and maintained for (24±1)h. The pull-out force of the single grass strand at 10 points is tested using a handheld tensor, and the average value is taken as the high-temperature and high-humidity single-strand pull-out force value after hot water aging.

[0219] Dimensional stability evaluation method:

[0220] In order to characterize the deformation resistance of the lawn, we measured the dimensional stability of the lawn according to the method in EN 13746:2004. The process is as follows:

[0221] Step 1:

[0222] Randomly select three test samples from the prepared test samples, each with a length and width of (400±10) mm. Make three marks on the four edges of each sample, two of which are 50 mm away from the right angle, and the other is in the middle of the edge line;

[0223] Step 2:

[0224] Place the marked samples in an environment with a relative humidity of (50±5)% and a temperature of (23±2)°C for at least 48 hours, and measure the length and width of the samples respectively;

[0225] Step 3 (immersion environment):

[0226] Immerse the sample in step 2 in an aqueous solution containing 0.1% sodium dodecyl sulfate at a temperature of (23±2)°C, take it out after soaking for (24±1) hours, and measure the length and width of the sample within 5 minutes;

[0227] Step 4 (freezing environment):

[0228] After completing step 3, immediately place the sample at a temperature of (-18±2)°C, and take it out after (24±1) hours to measure the length and width within 5 minutes;

[0229] Step 5 (heating environment):

[0230] After completing step 4, immediately place the sample at a temperature of (70±2)°C, and take it out after (72±1) hours to measure the length and width within 5 minutes;

[0231] Step 6 (room temperature):

[0232] After completing step 5, immediately place the sample in an environment with a relative humidity of (50±5)% and a temperature of (23±2)°C for (48±1) hours, and measure the length and width.

[0233] The dimensional change at each stage is calculated according to the following formula:

[0234] △L=(Lm-L0) / L0×100

[0235] Where L0 is the initial length of the sample, Lm is the length of each stage, with a minus sign indicating a decrease in size and a plus sign indicating an increase in size.

[0236] The artificial turf test samples prepared in the above comparative examples and embodiments were evaluated for relevant properties, and the results are shown in the following table:

[0237] Table 6 Performance test data of different comparative examples and embodiments

[0238]

[0239]

[0240] It can be seen from the test data of Comparative Examples 1-3 and Example 1 in Table 6 that when the adhesive composition of the present invention is applied to the artificial turf adhesive, the innermost single grass strand can maintain excellent pull-out force performance in a high temperature and high humidity environment after long-term hot water aging, and the performance is significantly improved compared to the existing styrene-butadiene adhesive, polyurethane adhesive and ethylene-vinyl acetate hot melt adhesive. In addition, in terms of stability, it is significantly improved compared to the existing ethylene-vinyl acetate hot melt adhesive, and a good balance can be obtained in terms of mechanical properties and stability. It can be seen from the test data of Comparative Examples 4 and 5 that the functional emulsion and surfactant in the composition are indispensable, and their synergistic effect is crucial to the improvement of performance. In addition, it can be seen from the test data of Example 2 that when a certain proportion of high thermal conductivity filler silicon carbide is added to the filler, when the back glue is cured, the heat can be quickly and timely delivered to the inside of the glue layer, which is of great help to improve the overall mechanical properties of the innermost grass fibers. Example 3 uses an amorphous α-polyolefin emulsion modified by maleic anhydride grafting, which also improves the overall mechanical properties of the innermost single grass fibers.

[0241] Table 7 Mechanical properties test data of different comparative examples and embodiments

[0242] Test items Example 4 Comparative Example 6 Example 5 Comparative Example 7 High temperature and high humidity single pull-out force after hot water aging (N) 9.6 7.1 9.6 7.3

[0243] It can be seen from the test data in Table 7 that the coarser the particle size of the emulsion, the more it affects the penetration of the entire adhesive, and thus affects the overall mechanical properties of the innermost single grass fiber.

[0244] Table 8 Mechanical properties test data of different comparative examples and embodiments

[0245]

[0246]

[0247] It can be seen from the test data in Table 8 that the solid content of the emulsion also affects the pull-out force performance of the innermost single grass fiber. The lower the solid content, the more water there is in the composition, which affects the subsequent drying and then affects the melt bonding. The higher the solid content, the worse the permeability, which will ultimately have an adverse effect on the performance production. Therefore, the solid content also needs to be within a suitable range.

[0248] Table 9 Mechanical properties test data of different comparative examples and embodiments

[0249]

[0250] From the data of Examples 12 to 15 in Table 9, it can be seen that both the amorphous α-polyolefin emulsion and the functional emulsion need to be within a suitable ratio range. If the content of amorphous α-polyolefin emulsion in the composition is too high and the content of functional emulsion is too low, penetration and wetting will be affected. If the content of amorphous α-polyolefin emulsion is too low and the content of functional emulsion is too high, the film formation of the entire adhesive layer will be affected, and the lack of sufficient olefin segments will further affect the adhesion to the grass fiber interface. From the test data of Examples 10-11 and Examples 16-19, it can be seen that the type and content of surfactants also have a great impact on performance. When anionic and nonionic compounds are used, surfactants can play a good penetration role at a lower content, improving the pull-out performance of the innermost single grass fiber in extreme environments.

[0251] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An adhesive composition for artificial turf, characterized in that: According to mass percentage, it includes the following components: 10-50% of amorphous α-polyolefin emulsion or modified amorphous α-polyolefin emulsion with an average particle size of latex particles less than 3 μm, and the solid content of the amorphous α-polyolefin emulsion or modified amorphous α-polyolefin emulsion is 40-60%; The average particle size of latex particles is less than 5-40% of the functional resin emulsion of 3 μm, and the solid content of the functional resin emulsion is 40-60%; Surfactant 0.1-10%; Inorganic filler 0-80%; The modified monomer of the modified amorphous α-polyolefin emulsion includes one or more of acrylic acid, methacrylic acid, ethylene acrylic acid, glycidyl methacrylate or maleic anhydride; The base resin modified amorphous α-polyolefin resin in the modified amorphous α-polyolefin emulsion comprises 0.1-10% of modified monomer structural units according to mass percentage.

2. The adhesive composition for artificial turf according to claim 1, characterized in that: The matrix resin amorphous α-polyolefin in the amorphous α-polyolefin emulsion is formed by polymerization of ethylene, propylene and 1-butene; The matrix resin modified amorphous α-polyolefin in the modified amorphous α-polyolefin emulsion is obtained by grafting modified amorphous α-polyolefin with modified monomers.

3. The adhesive composition for artificial turf according to claim 1, characterized in that: The average particle size of the latex particles in the amorphous α-polyolefin emulsion or the modified amorphous α-polyolefin emulsion is 0.05-2 μm.

4. The adhesive composition for artificial turf according to claim 1, characterized in that: The functional resin emulsion is one or more of terpene resin emulsion, rosin resin emulsion or petroleum resin emulsion.

5. The adhesive composition for artificial turf according to claim 1, characterized in that: The average particle size of the latex particles in the functional resin emulsion is 0.05-2 μm.

6. The adhesive composition for artificial turf according to claim 1, characterized in that: The surfactant is one or more of anionic surfactant, cationic surfactant or nonionic surfactant.

7. The adhesive composition for artificial turf according to claim 1, characterized in that: The inorganic filler is one or more of calcium carbonate, mica, barium sulfate, aluminum hydroxide, magnesium hydroxide, talc, wollastonite, glass microspheres, silicon dioxide or silicon carbide.

8. A method for preparing an adhesive composition for artificial turf, characterized in that: The following steps are involved: (1) Weighing the raw materials of the adhesive composition for artificial turf according to any one of claims 1 to 7; (2) Mixing and stirring the amorphous α-polyolefin emulsion, the functional resin emulsion, the surfactant and the inorganic filler to obtain the adhesive composition for artificial turf.

9. An artificial turf, characterized in that: The invention comprises the adhesive composition for artificial turf according to any one of claims 1 to 7, artificial turf yarns and a base fabric, wherein the artificial turf yarns are tufted on the base fabric, and the adhesive backing surface of the base fabric is coated with the adhesive composition for artificial turf.

10. A method for preparing an artificial turf, characterized in that: The following steps are involved: 1) melt-extruding polyethylene and / or polypropylene, drawing and heat-setting to obtain artificial turf yarn; 2) Tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product; 3) The adhesive composition for artificial turf according to any one of claims 1 to 7 is uniformly applied on the adhesive backing surface of the obtained semi-finished artificial turf, and then dried to obtain the artificial turf.

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