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 thereof, and belongs to the technical field of artificial turfs, the adhesive composition for the artificial turf comprises the following components by mass: 10-50% of an ethylene-vinyl acetate copolymer emulsion with an average particle size of latex particles less than 3 [mu] m; 5-40% of a functional resin emulsion in which the average particle size of latex particles is less than 3 [mu] m; 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, and the bonding strength of the inner single grass yarn, most difficult to permeate, of the artificial lawn is still kept good in the high-temperature and high-humidity environment after hot water aging.

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 quite strict requirements for the adhesive that fixes the grass fibers. How to fix the grass fibers and keep them from falling off for several years or even more than ten years is a very important performance.

[0003] Since the birth of artificial turf, manufacturers have used styrene-butadiene glue and polyurethane glue as adhesive layers. 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 bonding strength, 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. After experiencing long-term rainy weather, the mechanical properties of the adhesive layer have seriously decreased and cannot meet the use requirements of high-strength sports venues. Two-component polyurethane glue is another adhesive commonly used by manufacturers. It 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.

[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 mechanical properties 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. The existing artificial turf adhesive technology generally has the problem of poor mechanical properties at both the production end and the product use end, especially the innermost single grass strand of the entire cluster of artificial turf grass strands, which has always been the short board of the entire mechanical properties. Therefore, it is necessary to develop an artificial turf adhesive with low environmental requirements during the production process and high temperature and high humidity resistance during use, so as to improve the single pull-out force performance of the innermost grass strand in extreme environments, thereby meeting the growing needs of the market.

[0005] There are also related studies on the application of ethylene-vinyl acetate in artificial turf in the prior art, but the content of its ethylene structural unit is insufficient, so the raw material selection is not enough to provide help for the mechanical properties of the innermost single grass strand in extreme environments. There is also ethylene-vinyl acetate copolymer as one of the raw materials, but its adhesive is heated and then evenly coated on one side of the non-woven fabric in a dripping manner, and the non-woven fabric is pressed on the back of the base fabric of the artificial turf by hot pressing. In essence, it still uses the traditional hot melt adhesive gluing method. Due to the high viscosity of the adhesive during hot melting, it cannot be compared with the permeability of the water-based system, and it is difficult to penetrate into the grass root, resulting in poor mechanical properties of the innermost single grass strand in the extreme environment of high temperature and high humidity.

[0006] 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

[0007] In view of this, the present invention provides an adhesive composition for artificial turf, artificial turf and a preparation method thereof.

[0008] In order to achieve the above object, the present invention adopts the following technical solution:

[0009] An adhesive composition for artificial turf, comprising the following components by mass percentage:

[0010] 10-50% of ethylene-vinyl acetate copolymer emulsion or modified ethylene-vinyl acetate copolymer emulsion with an average particle size of latex particles less than 3 μm, and the solid content of the ethylene-vinyl acetate copolymer emulsion is 40-60%;

[0011] 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%;

[0012] Surfactant 0.1-10%;

[0013] Inorganic filler 0-80%;

[0014] The matrix resin ethylene-vinyl acetate copolymer in the ethylene-vinyl acetate copolymer emulsion comprises 10-60% of vinyl acetate structural units by mass percentage;

[0015] The matrix resin modified ethylene-vinyl acetate copolymer in the modified ethylene-vinyl acetate copolymer emulsion comprises 10-60% of vinyl acetate structural units and 0.1-10% of modified monomer structural units, and the modified monomer comprises one or more of methacrylic acid, acrylic acid, glycidyl methacrylate or maleic anhydride, according to mass percentage.

[0016] The beneficial effects of the present invention are as follows: firstly, the adhesive composition of the present invention introduces ethylene-vinyl acetate copolymer emulsion, and further limits the content of vinyl acetate structural units in the ethylene-vinyl acetate copolymer, thereby ensuring that the appropriate ratio of non-polar ethylene units and polar vinyl acetate units has sufficient bonding strength to polyolefin grass fibers during later curing; meanwhile, the functional resin emulsion is introduced into the composition, thereby ensuring that the viscosity of the system is reduced during melt bonding, which is beneficial to improving the penetration of the composition system into the innermost single grass fiber, and fully wetting the surface thereof, thereby providing assistance for forming an ideal bonding strength at the interface;

[0017] Secondly, the adhesive composition of the present invention selects suitable surfactants, emulsion particle size and emulsion solid content to ensure good fluidity of the entire composition system, providing a basis for improving the mechanical properties of the most difficult to penetrate internal single grass fibers under extreme environments;

[0018] Finally, in order to further improve the bonding strength, the adhesive composition of the present invention can also be combined with inorganic fillers with higher thermal conductivity in the selection of fillers, so that the adhesive of this water-based system can fully melt and bond the single grass silk at the innermost part of the whole cluster of grass silk under the existing back-adhesive process to obtain ideal mechanical properties.

[0019] Through the synergistic effect of the above three aspects, the adhesive composition of the present invention can give the backing excellent bonding strength, especially when the backing is aged in hot water and is placed in a high temperature and high humidity environment, the pull-out performance of the innermost single grass fiber of the lawn is still excellent; 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.

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

[0022] 20-40% of ethylene-vinyl acetate copolymer 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 1-5%;

[0025] Inorganic filler 25-65%.

[0026] Furthermore, the average particle size of the latex particles in the above ethylene-vinyl acetate copolymer emulsion is 0.05-2 μm.

[0027] Furthermore, the functional resin emulsion is one or more of terpene resin emulsion, rosin resin emulsion or petroleum resin emulsion.

[0028] Furthermore, the above-mentioned rosin resin emulsion includes but is not limited to one or both of rosin glycerol ester emulsion or rosin pentaerythritol ester emulsion, and the above-mentioned petroleum resin emulsion includes but is not limited to 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.

[0029] Furthermore, the above ethylene-vinyl acetate copolymer emulsion is prepared from ethylene and vinyl acetate by an emulsion polymerization method, or is prepared from ethylene-vinyl acetate copolymer resin by a resin emulsification method.

[0030] Furthermore, the modified ethylene-vinyl acetate copolymer emulsion is prepared from the modified ethylene-vinyl acetate copolymer resin by a resin emulsification method.

[0031] Furthermore, the above-mentioned ethylene-vinyl acetate copolymer emulsion is a single component or a multi-component mixture obtained by an emulsion polymerization method, or a single component or a multi-component mixture obtained by a resin emulsification method, or a multi-component mixture of an emulsion obtained by an emulsion polymerization method and an emulsion obtained by a resin emulsification method.

[0032] Furthermore, the specific steps of preparing the above-mentioned ethylene-vinyl acetate copolymer emulsion from ethylene and vinyl acetate by emulsion polymerization are:

[0033] Deionized water, stabilizer, emulsifier and dispersing aid are added to a reactor, stirred at a speed of 100-200 rpm for 10-20 minutes to mix the materials evenly, vinyl acetate monomer is divided into two parts, and then the first part of vinyl acetate monomer is added, the temperature of the reactor is raised to 50-70°C, and ethylene gas is introduced. When the pressure reaches 35-45 bar, the ethylene valve is closed, and an initiator is immediately added to the reactor to initiate a reaction. Then, the remaining part of the vinyl acetate monomer is added within 60-120 minutes, and ethylene gas is continuously introduced until the pressure in the reactor is 50-60 bar. After keeping the temperature for 5-6 hours, a defoaming agent is added for degassing treatment for 1-2 hours to prepare an ethylene-vinyl acetate copolymer emulsion.

[0034] Furthermore, the specific steps of preparing the above-mentioned ethylene-vinyl acetate copolymer emulsion or modified ethylene-vinyl acetate copolymer emulsion from ethylene-vinyl acetate copolymer resin or modified ethylene-vinyl acetate copolymer resin by a resin emulsification method are:

[0035] Deionized water, emulsifier and ethylene-vinyl acetate copolymer resin or modified ethylene-vinyl acetate copolymer 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, and the speed of the dispersing disk is adjusted to 5000-15000rpm, and the temperature is kept warm for 10-30min, and then an emulsifying device is started, and the speed of the emulsifying head is adjusted to 10000-30000rpm, and the temperature is kept warm for 2-6h, and the material is cooled to 40-60°C and discharged to obtain an ethylene-vinyl acetate copolymer emulsion or a modified ethylene-vinyl acetate copolymer emulsion.

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

[0037] Furthermore, the specific steps of preparing the above terpene resin emulsion by the resin emulsification method are:

[0038] Add deionized water, emulsifier and terpene resin into the reaction kettle, start stirring, adjust the stirring speed to 50-150rpm, raise the temperature to 100-150℃, 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 terpene resin emulsion.

[0039] Furthermore, the average particle size of the latex particles in the functional resin emulsion is 0.05-2 μm.

[0040] Furthermore, the above-mentioned surfactant is one or more of anionic surfactant, cationic surfactant or nonionic surfactant.

[0041] Furthermore, the above-mentioned surfactant is an anionic surfactant and a nonionic surfactant.

[0042] Furthermore, the above-mentioned anionic surfactant includes but is not limited to 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 includes but is not limited to one or more of dodecyl ammonium chloride, hexadecyltrimethylammonium bromide or hexadecylpyridinium quaternary ammonium salt; the above-mentioned nonionic surfactant includes but is not limited to one or more of polyoxyethylene ether, castor oil polyoxyethylene ether, polyethylene glycol, Span 80, Tween 80 or Tween 20.

[0043] Furthermore, the inorganic filler includes but is not limited to one or more of calcium carbonate, mica, barium sulfate, aluminum hydroxide, magnesium hydroxide, talc, wollastonite, glass beads, silicon dioxide or silicon carbide.

[0044] Furthermore, the inorganic filler includes but is not limited to one or more of calcium carbonate, aluminum hydroxide, silicon dioxide or silicon carbide.

[0045] Furthermore, the above-mentioned adhesive composition for artificial turf also includes one or more of a color paste, a defoamer or a thickener.

[0046] The present invention also provides a method for preparing an adhesive composition for artificial turf, comprising the following steps:

[0047] (1) weighing various raw materials according to the above-mentioned adhesive composition for artificial turf;

[0048] (2) The ethylene-vinyl acetate copolymer 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.

[0049] 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.

[0050] Furthermore, in step (2), the stirring speed is 400-600 rpm, and the stirring time is 30-60 min.

[0051] 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.

[0052] The present invention also provides a method for preparing an artificial turf, comprising the following steps:

[0053] 1) melt-extruding polyethylene and / or polypropylene, drawing and heat-setting to obtain artificial turf yarn;

[0054] 2) Tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0055] 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.

[0056] Beneficial effects of the invention: The method for preparing artificial turf of the invention has simple process and is conducive to industrial application.

[0057] 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.

[0058] Further, in step 3), the amount of adhesive applied to the artificial turf adhesive composition is 500-1500 kg / m 2 .

[0059] Furthermore, in step 3), the drying temperature is 100-150° C. and the drying time is 8-14 min. DETAILED DESCRIPTION

[0060] 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 creative work are within the scope of protection of the present invention.

[0061] The specific steps of preparing ethylene-vinyl acetate copolymer emulsion by emulsion polymerization in Example 5 are:

[0062] According to the mass percentage, 48.5% deionized water, 3% hydroxyethyl cellulose, 0.1% disodium ethylenediaminetetraacetate, 0.2% ammonium polycarboxylate and 1.5% fatty alcohol polyoxyethylene ether (solid content 65%) were added to the reactor, stirred at a speed of 150 rpm for 15 minutes, the materials were mixed evenly, the pH of the materials was adjusted to 4.5 with formic acid, 0.01% Mohr's salt was added, 37.6% vinyl acetate monomer was divided into two parts, and then 10% vinyl acetate monomer of the first part was added, and the temperature of the reactor was raised to 55°C. , and ethylene gas was introduced. When the pressure reached 40 bar, the ethylene valve was closed, and 0.3% tert-butyl hydroperoxide and 0.6% disodium hydroxyacetic acid sulfinate were then added dropwise to the reactor to initiate the reaction. Then, the remaining 27.6% of vinyl acetate monomer was added within 90 minutes, and ethylene gas was continued to be introduced (about 8% ethylene gas was introduced twice in total) until the pressure in the reactor reached 52 bar. After keeping warm for 5 hours, 0.1% silicone defoamer (solid content 30%) was added and degassed for 2 hours to prepare ethylene-vinyl acetate copolymer emulsion.

[0063] Except for the ethylene-vinyl acetate copolymer emulsion prepared by emulsion polymerization in Example 5, the ethylene-vinyl acetate copolymer emulsion or modified ethylene-vinyl acetate copolymer emulsion in other examples and comparative examples were prepared by resin emulsification method, and the specific steps were as follows:

[0064] According to the material ratio in Table 1 below, ethylene-vinyl acetate copolymer resin or maleic anhydride modified ethylene-vinyl acetate copolymer 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 1, and the dispersion device is started at the same time, and the dispersion disk speed is set according to the process parameters in Table 1 below, and the temperature is kept for 20min, and then the emulsification device is started, and the emulsification head speed is set according to the process parameters in Table 1 below, and the temperature is kept for 4h, and the material is cooled to 40℃ and discharged to obtain ethylene-vinyl acetate copolymer emulsion or maleic anhydride modified ethylene-vinyl acetate copolymer emulsion. The ethylene-vinyl acetate copolymer emulsions with a VA content of 19%, D50=1μm, and different solid contents in the embodiments and comparative examples are obtained by diluting the ethylene-vinyl acetate copolymer emulsion with a solid content of 65% in Table 1 below with water.

[0065] Table 1

[0066]

[0067] The functional resin emulsion in the embodiments and comparative examples of the present invention is a terpene resin emulsion, and the specific steps of preparing the terpene resin emulsion by the resin emulsification method are as follows:

[0068] According to the material ratio in Table 2 below, terpene resin, emulsifier and deionized water are added to the reactor respectively, stirring is started, and the stirring speed is adjusted to 100 rpm, and the temperature is increased according to the process parameters in the table, and the dispersion device is started at the same time, 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 Table 2 below, and the temperature is kept for 4 hours, and the material is cooled to 40°C to obtain a terpene resin emulsion. The terpene resin emulsions with D50=1μm and different solid contents in the embodiments and comparative examples are obtained by diluting the terpene resin emulsion with a solid content of 65% in Table 2 below with water.

[0069] Table 2

[0070]

[0071] Preparation of styrene-butadiene adhesive composition:

[0072] 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;

[0073] 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.

[0074] Preparation of two-component polyurethane adhesive composition:

[0075] 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;

[0076] 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.

[0077] 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;

[0078] 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.

[0079] Example 1

[0080] The method for preparing artificial turf comprises the following steps:

[0081] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0082] The ethylene-vinyl acetate copolymer 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;

[0083] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0084] (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.

[0085] Example 2

[0086] The method for preparing artificial turf comprises the following steps:

[0087] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic fillers of 40% calcium carbonate and 7% silicon carbide;

[0088] The ethylene-vinyl acetate copolymer 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;

[0089] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0090] (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.

[0091] Example 3

[0092] The method for preparing artificial turf comprises the following steps:

[0093] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 10% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0094] The ethylene-vinyl acetate copolymer 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;

[0095] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0096] (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.

[0097] Example 4

[0098] The method for preparing artificial turf comprises the following steps:

[0099] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 28% of vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0100] The ethylene-vinyl acetate copolymer 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;

[0101] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0102] (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.

[0103] Example 5

[0104] The method for preparing artificial turf comprises the following steps:

[0105] (1) Weigh the following components by mass percentage: 15% ethylene-vinyl acetate copolymer emulsion (solid content 50%) with latex particles D50=1 μm obtained by emulsion polymerization; matrix resin ethylene-vinyl acetate copolymer, including 85% of vinyl acetate structural units by mass percentage; 15% ethylene-vinyl acetate copolymer emulsion (solid content 50%) with latex particles D50=1 μm obtained by resin emulsification method; matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units by mass percentage; 20% functional resin emulsion (solid content 50%) with latex particles D50=1 μm; surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0106] The ethylene-vinyl acetate copolymer 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;

[0107] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0108] (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.

[0109] Example 6

[0110] The method for preparing artificial turf comprises the following steps:

[0111] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 60% of vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0112] The ethylene-vinyl acetate copolymer 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;

[0113] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0114] (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.

[0115] Example 7

[0116] The method for preparing artificial turf comprises the following steps:

[0117] (1) Weigh the following components by mass percentage: 30% of maleic anhydride-modified ethylene-vinyl acetate copolymer emulsion (solid content 50%) with latex particles D50=1 μm, matrix resin maleic anhydride-modified ethylene-vinyl acetate copolymer, which, by mass percentage, includes 10% vinyl acetate structural units and 0.6% maleic anhydride structural units; 20% of functional resin emulsion (solid content 50%) with latex particles D50=1 μm; surfactants are 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler is 47% calcium carbonate;

[0118] The ethylene-vinyl acetate copolymer 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;

[0119] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0120] (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.

[0121] Example 8

[0122] The method for preparing artificial turf comprises the following steps:

[0123] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=2 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0124] The ethylene-vinyl acetate copolymer 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;

[0125] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0126] (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.

[0127] Example 9

[0128] The method for preparing artificial turf comprises the following steps:

[0129] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=2 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0130] The ethylene-vinyl acetate copolymer 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;

[0131] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0132] (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.

[0133] Example 10

[0134] The method for preparing artificial turf comprises the following steps:

[0135] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 40%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0136] The ethylene-vinyl acetate copolymer 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;

[0137] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0138] (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.

[0139] Embodiment 11

[0140] The method for preparing artificial turf comprises the following steps:

[0141] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 60%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0142] The ethylene-vinyl acetate copolymer 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;

[0143] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0144] (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.

[0145] Example 12

[0146] The method for preparing artificial turf comprises the following steps:

[0147] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 40%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0148] The ethylene-vinyl acetate copolymer 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;

[0149] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0150] (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.

[0151] Example 13

[0152] The method for preparing artificial turf comprises the following steps:

[0153] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 60%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0154] The ethylene-vinyl acetate copolymer 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;

[0155] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0156] (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.

[0157] Embodiment 14

[0158] The method for preparing artificial turf comprises the following steps:

[0159] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactant is 3% sodium dodecyl sulfate; inorganic filler is 47% calcium carbonate;

[0160] The ethylene-vinyl acetate copolymer 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;

[0161] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0162] (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.

[0163] Embodiment 15

[0164] The method for preparing artificial turf comprises the following steps:

[0165] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactant is 3% castor oil polyoxyethylene ether; inorganic filler is 47% calcium carbonate;

[0166] The ethylene-vinyl acetate copolymer 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;

[0167] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0168] (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.

[0169] Examples 16-23

[0170] According to Example 1, except for the different mass percentages of ethylene-vinyl acetate copolymer emulsion, terpene 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.

[0171] Table 3 Raw material mass percentage table of Examples 16-23

[0172]

[0173] Comparative Example 1

[0174] The method for preparing artificial turf comprises the following steps:

[0175] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0176] (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.

[0177] Comparative Example 2

[0178] The method for preparing artificial turf comprises the following steps:

[0179] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0180] (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.

[0181] Comparative Example 3

[0182] The method for preparing artificial turf comprises the following steps:

[0183] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0184] (2) Prepare an adhesive composition according to the method disclosed in Example 2 of patent application number 200780101243.2, and evenly apply it on the adhesive back surface of the obtained artificial turf semi-finished product, with an adhesive amount of 1000 kg / m 2 , and then dried to obtain artificial turf.

[0185] Comparative Example 4

[0186] The method for preparing artificial turf comprises the following steps:

[0187] (1) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0188] (2) Prepare an adhesive composition according to the method disclosed in Example 1 of patent application number 201510491592.6, heat the adhesive composition to 175° C., and evenly apply it on one side of the non-woven fabric by dripping, and press the side of the non-woven fabric onto the back of the semi-finished artificial turf by hot pressing.

[0189] Comparative Example 5

[0190] The method for preparing artificial turf comprises the following steps:

[0191] (1) Weigh the following components by mass percentage: 47% of ethylene-vinyl acetate copolymer emulsion (solid content 50%) with latex particles D50=1 μm; matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; surfactants of 4.4% sodium lauryl sulfate and 1.6% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0192] The ethylene-vinyl acetate copolymer 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;

[0193] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0194] (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.

[0195] Comparative Example 6

[0196] The method for preparing artificial turf comprises the following steps:

[0197] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); inorganic filler is 50% calcium carbonate;

[0198] The ethylene-vinyl acetate copolymer emulsion, the functional resin emulsion 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;

[0199] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0200] (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.

[0201] Comparative Example 7

[0202] The method for preparing artificial turf comprises the following steps:

[0203] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 8% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0204] The ethylene-vinyl acetate copolymer 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;

[0205] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0206] (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.

[0207] Comparative Example 8

[0208] The method for preparing artificial turf comprises the following steps:

[0209] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 65% of vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0210] The ethylene-vinyl acetate copolymer 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;

[0211] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0212] (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.

[0213] Comparative Example 9

[0214] The method for preparing artificial turf comprises the following steps:

[0215] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=4 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0216] The ethylene-vinyl acetate copolymer 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;

[0217] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0218] (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.

[0219] Comparative Example 10

[0220] The method for preparing artificial turf comprises the following steps:

[0221] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% vinyl acetate structural units by mass percentage; 20% of functional resin emulsion with latex particles D50=4 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0222] The ethylene-vinyl acetate copolymer 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;

[0223] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0224] (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.

[0225] Comparative Example 11

[0226] The method for preparing artificial turf comprises the following steps:

[0227] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 35%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0228] The ethylene-vinyl acetate copolymer 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;

[0229] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0230] (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.

[0231] Comparative Example 12

[0232] The method for preparing artificial turf comprises the following steps:

[0233] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 65%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 50%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0234] The ethylene-vinyl acetate copolymer 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;

[0235] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0236] (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.

[0237] Comparative Example 13

[0238] The method for preparing artificial turf comprises the following steps:

[0239] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 35%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0240] The ethylene-vinyl acetate copolymer 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;

[0241] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0242] (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.

[0243] Comparative Example 14

[0244] The method for preparing artificial turf comprises the following steps:

[0245] (1) Weigh the following components by mass percentage: 30% of ethylene-vinyl acetate copolymer emulsion with latex particles D50=1 μm (solid content 50%); matrix resin ethylene-vinyl acetate copolymer, including 19% of vinyl acetate structural units (VA) by mass percentage; 20% of functional resin emulsion with latex particles D50=1 μm (solid content 65%); surfactants of 2.2% sodium lauryl sulfate and 0.8% castor oil polyoxyethylene ether; inorganic filler of 47% calcium carbonate;

[0246] The ethylene-vinyl acetate copolymer 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;

[0247] (2) tufting the obtained artificial turf yarn on a base fabric to obtain an artificial turf semi-finished product;

[0248] (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.

[0249] Table 4 Physical properties of ethylene-vinyl acetate copolymer emulsion

[0250]

[0251]

[0252] Table 5 Raw material particle size parameters

[0253]

[0254] Table 6 Raw material solid content parameters

[0255]

[0256] Effect Experiment

[0257] Evaluation method for single-root pull-out force performance at high temperature and high humidity after hot water aging:

[0258] 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.

[0259] Table 7 Mechanical properties test data of different comparative examples and embodiments

[0260]

[0261]

[0262] It can be seen from the test data of Comparative Examples 1 to 4 and Example 1 in Table 7 that when the adhesive composition of the present invention is applied to the artificial turf back glue, the innermost single grass silk can maintain excellent pull-out force performance under high temperature and high humidity environment after long-term hot water aging, and the performance is significantly improved compared with the existing butadiene-styrene back glue, polyurethane back glue and the back glue technology disclosed in Patents 200780101243.2 and 201510491592.6. It can be seen from the test data of Comparative Examples 5 and 6 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 very helpful for improving the mechanical properties of the innermost grass silk.

[0263] Table 8 Mechanical properties test data of different comparative examples and embodiments

[0264]

[0265] From the data of the examples and comparative examples in Table 8, it can be seen that the content of the vinyl acetate structural unit in the ethylene-vinyl acetate emulsion in the adhesive composition of the present invention needs to be within a suitable range. Too low or too high will have an adverse effect on the mechanical properties of the innermost single grass strand under extreme conditions. In addition, from the data of Examples 3 and 7, it can be seen that after the matrix resin is modified with maleic anhydride, the mechanical properties of the innermost single grass strand can be improved to a certain extent.

[0266] Table 9 Mechanical properties test data of different comparative examples and embodiments

[0267]

[0268] It can be seen from the test data in Table 9 that the coarser the particle size of the emulsion, the more it affects the penetration of the entire adhesive, and thus affects the performance of the innermost single grass fiber.

[0269] Table 10 Mechanical properties test data of different comparative examples and embodiments

[0270]

[0271] It can be seen from the test data in Table 10 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.

[0272] Table 11 Mechanical properties test data of different comparative examples and embodiments

[0273]

[0274] From the data of Examples 16 to 19 in Table 11, it can be seen that both ethylene-vinyl acetate emulsion and functional emulsion need to be within a suitable ratio range. If the content of ethylene-vinyl acetate 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 ethylene-vinyl acetate emulsion is too low and the content of functional emulsion is too high, the film formation of the entire adhesive layer will be affected. There is a lack of sufficient ethylene segments and polar vinyl acetate, which in turn affects the adhesion to the grass fiber interface. From the test data of Examples 14-15 and Examples 20-23, it can be seen that the type and content of surfactants also have a great impact on performance. When using anionic and nonionic compounds, 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.

[0275] 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 ethylene-vinyl acetate copolymer emulsion or modified ethylene-vinyl acetate copolymer emulsion with an average particle size of latex particles less than 3 μm, and the solid content of the ethylene-vinyl acetate copolymer 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 matrix resin ethylene-vinyl acetate copolymer in the ethylene-vinyl acetate copolymer emulsion comprises 10-60% of vinyl acetate structural units by mass percentage; The matrix resin modified ethylene-vinyl acetate copolymer in the modified ethylene-vinyl acetate copolymer emulsion comprises 10-60% of vinyl acetate structural units and 0.1-10% of modified monomer structural units, and the modified monomer comprises one or more of methacrylic acid, acrylic acid, glycidyl methacrylate or maleic anhydride, according to mass percentage.

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

3. 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.

4. 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.

5. 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.

6. The adhesive composition for artificial turf according to claim 1, characterized in that: The anionic surfactant includes but is not limited to 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 cationic surfactant includes but is not limited to one or more of dodecyl ammonium chloride, hexadecyltrimethylammonium bromide or hexadecylpyridinium quaternary ammonium salt; the nonionic surfactant includes but is not limited to one or more of polyoxyethylene ether, castor oil polyoxyethylene ether, polyethylene glycol, Span 80, Tween 80 or Tween 20.

7. The adhesive composition for artificial turf according to claim 1, characterized in that: The inorganic filler includes but is not limited to 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) The ethylene-vinyl acetate copolymer emulsion, the functional resin emulsion, the surfactant and the inorganic filler are mixed and stirred 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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