A high-strength, weather-resistant artificial turf fiber, an artificial turf comprising the same, and a method of manufacturing the same

Abstract

The application discloses a high-strength anti-aging artificial turf fiber, artificial turf containing the same and a preparation method thereof, wherein the high-strength anti-aging artificial turf fiber comprises the following components in percentage by weight: 20-60% of metallocene polyethylene, 27-67% of linear low-density polyethylene, 5-10% of functional master batch and 3-8% of color master batch. The artificial turf fiber is obtained by adopting the blending modification mode of metallocene polyethylene and linear low-density polyethylene, has the advantages of high strength of metallocene polyethylene, solves the processing difficulty of metallocene polyethylene, and improves the mechanical properties of the artificial turf fiber; the high-strength anti-aging artificial turf fiber is prepared into artificial turf by the tufting or weaving mode and is tufted or woven on the artificial turf base cloth, has the advantages of good wear resistance, softness, high pull-out force and the like, can be widely applied to places with high sports intensity and various landscape leisure sites, and has a more wide market development prospect.

Description

Technical Field

[0001] This invention relates to the field of artificial turf technology, specifically to a high-strength, aging-resistant artificial turf fiber, an artificial turf containing the fiber, and a method for its preparation. Background Technology

[0002] Compared with natural grass, artificial turf has developed rapidly due to its high simulation, simple maintenance, low maintenance cost, less impact from rain and snow, and 24-hour use. It is widely used in sports fields such as football, hockey, and tennis, as well as in landscape greening, courtyard decoration, and other landscape and leisure places.

[0003] Currently, artificial turf mainly consists of a base layer, a buffer layer, and a turf layer. The turf layer is primarily composed of turf fibers, which are a key component determining the overall quality of the turf. Good turf fibers possess advantages such as softness, skin-friendliness, abrasion resistance, good stiffness, low shrinkage, and anti-aging properties. Patent CN109661426B discloses a polyethylene composition for artificial turf yarn. Artificial turf produced using this composition exhibits good abrasion resistance, but the turf yarn has a relatively high shrinkage rate; specifically, the shrinkage rate was measured at 11.7-14.8% after exposure in a 90°C hot air oven for 2 minutes. Patent CN107208320B discloses an artificial turf filament composed of a vinyl composition, which improves the shrinkage rate of the turf fibers, but does not mention the strength and anti-aging properties of the turf fibers. In other words, in existing published patent literature, there is limited research on improving the strength of turf fibers and the retention rate of strength after aging.

[0004] Therefore, how to improve the overall performance of turf fibers is a problem that needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this invention is to provide a high-strength, aging-resistant artificial turf fiber, an artificial turf containing the fiber, and a method for preparing the fiber. The invention mainly adopts a blending modification method with metallocene polyethylene and linear low-density polyethylene. This method not only has the advantage of high strength of metallocene polyethylene, but also solves the problem of difficult processing of metallocene polyethylene through blending modification with linear low-density polyethylene, and improves the mechanical properties of the artificial turf fiber.

[0006] To achieve the above objectives, one objective of this invention is to provide a high-strength, aging-resistant artificial turf fiber, comprising the following components by weight percentage:

[0007]

[0008] Preferably, the metallocene polyethylene has a melt index of 0.1-10 g / 10 min and a density of 0.900-0.940 g / cm³. 3 ;

[0009] And / or, the linear low-density polyethylene has a melt index of 0.5-10 g / 10 min and a density of 0.910-0.940 g / cm³. 3 .

[0010] Preferably, the metallocene polyethylene has a melt flow index of 0.8-4 g / 10 min and a density of 0.91-0.92 g / cm³. 3 .

[0011] And / or, the linear low-density polyethylene has a melt index of 0.8-4 g / 10 min and a density of 0.912-0.935 g / cm³. 3 .

[0012] Preferably, the functional masterbatch comprises the following components in the indicated weight percentages:

[0013]

[0014] Preferably, the UV aging aid is a combination of antioxidants, benzotriazole UV absorbers, and hindered amine light stabilizers;

[0015] And / or, the inorganic filler is nanoscale with a particle size of 10-200 nm;

[0016] And / or, the inorganic filler is one or more of nano-titanium oxide, nano-zinc oxide, and nano-cerium oxide;

[0017] And / or, the processing aid is one or more of the following: coupling agent, liquid paraffin, polyethylene wax, calcium stearate, barium stearate, and sodium hexametaphosphate.

[0018] Preferably, the particle size of the inorganic filler is 20-50 nm.

[0019] The aforementioned beneficial effects include at least the following: the inorganic fillers are nano-titanium oxide, nano-zinc oxide, nano-cerium oxide, etc., which have strong ultraviolet absorption capabilities in different wavelengths; the selection of their particle size and dispersant is to better disperse the inorganic fillers; and the ratio of the above materials can achieve the optimal mechanical strength and aging resistance of artificial turf fibers.

[0020] Preferably, the melt index of the matrix PE resin is ≥7 g / 10 min.

[0021] The aforementioned beneficial effects include at least the ability to improve the flowability of functional masterbatches and to improve their dispersibility when added to the matrix PE resin.

[0022] Preferably, the high-strength, aging-resistant artificial turf fiber has a mechanical strength of ≥15cN / tex and a strength retention rate of >80%.

[0023] The second objective of this invention is to provide a method for preparing high-strength, aging-resistant artificial turf fibers, comprising the following steps:

[0024] 1) Preparation of functional masterbatch:

[0025] Basic PE resin, UV aging aid, inorganic filler and processing aid are added to a high-speed mixer in proportion and mixed for 5-8 minutes. The mixed material is then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0026] 2) Metallocene polyethylene, linear low-density polyethylene, functional masterbatch, and color masterbatch are mixed evenly in proportion and then melt-extruded, cooled, stretched, shaped, wound, and twisted in a plastic extrusion and drawing unit to obtain high-strength and aging-resistant artificial turf fibers.

[0027] The draw ratio is 4-8 times, the heat treatment temperature is 90-130℃, and the relaxation heat treatment ratio is 1-30%.

[0028] A third objective of this invention is to provide a high-strength, age-resistant artificial turf, comprising the aforementioned high-strength, age-resistant artificial turf fibers.

[0029] The fourth objective of this invention is to provide a method for preparing high-strength, age-resistant artificial turf, wherein the high-strength, age-resistant artificial turf fibers are tufted or woven onto an artificial turf base fabric, and the bottom of the artificial turf base fabric is coated with an adhesive, and the high-strength, age-resistant artificial turf is obtained by drying and curing.

[0030] It should also be noted that the linear low-density polyethylene mentioned in this invention refers to other linear low-density polyethylenes besides metallocene polyethylene.

[0031] In summary, the present invention has at least the following advantages:

[0032] (1) The present invention adopts the method of blending and modifying metallocene polyethylene with linear low-density polyethylene. It not only utilizes the high strength of metallocene polyethylene, but also solves the problem of difficult processing of metallocene polyethylene by blending and modifying it with linear low-density polyethylene, and improves the mechanical properties of artificial turf fibers.

[0033] (2) The inorganic filler used in this invention is at the nanoscale. When blended with polyethylene, it can further enhance the mechanical properties of polyethylene, reaching 15 cN / tex and above.

[0034] Meanwhile, the inorganic fillers are selected from nano-titanium oxide, zinc oxide, cerium oxide, etc., which have strong ultraviolet absorption capabilities in different wavelengths, which can significantly improve the aging resistance of artificial turf fibers and reduce the mechanical property loss rate of artificial turf fibers after aging to less than 20%.

[0035] Furthermore, by modifying polyethylene with inorganic nanofillers, the thermal shrinkage rate of artificial turf fibers can be greatly reduced, with a shrinkage rate of less than 5% at 90 degrees Celsius.

[0036] (3) The high-strength and aging-resistant artificial turf fiber designed in this invention can be open-net turf fiber or monofilament turf fiber. Extruded monofilament turf fiber can be made into various cross-sectional shapes according to different mold shapes. High-strength artificial turf can be prepared by using high-strength and aging-resistant artificial turf fiber. It not only has the advantages of good wear resistance, softness and high pull-out force, but can also be widely used in places with high sports intensity and various landscape leisure sites. The market development prospects are even broader. Detailed Implementation

[0037] The following description of embodiments of the present invention is intended to explain the invention and is not to be construed as limiting the invention.

[0038] Example 1

[0039] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0040] 1) Preparation of functional masterbatch:

[0041] Includes: 79.7 kg of base PE resin (melt index 10 g / 10 min), 2152 kg of antioxidant, 7838 kg of light stabilizer, 10 kg of nano titanium dioxide (particle size 10 nm), and 0.3 kg of titanate coupling agent.

[0042] The above materials are added to a high-speed mixer and mixed for 6 minutes. The mixed materials are then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0043] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0044] 2) Preparation of high-strength, aging-resistant artificial turf fibers:

[0045] Metallocene polyethylene (melt index 0.8 g / 10 min, density 0.914 g / cm³) 3 20 kg of linear low-density polyethylene (melt index 2 g / 10 min, density 0.918 g / cm³). 3 67kg, functional masterbatch 10kg, green masterbatch 3kg.

[0046] After the above materials are mixed evenly in proportion, a diamond-shaped mold is configured in the plastic extrusion drawing unit. Through operations such as melt extrusion, cooling, stretching, shaping, winding, and twisting, extruded diamond-shaped high-strength and aging-resistant artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0047] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0048] 3) Preparation of high-strength, aging-resistant artificial turf:

[0049] The extruded diamond-shaped high-strength and aging-resistant artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain high-strength artificial turf.

[0050] Example 2

[0051] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0052] 1) Preparation of functional masterbatch:

[0053] Includes: 38.8 kg of base PE resin (melt index 10 g / 10 min), 2152 kg of antioxidant, 2265 kg of UV absorber UV-3, 78313 kg of light stabilizer, 40 kg of nano titanium dioxide (particle size 50 nm), and 1.2 kg of titanate coupling agent.

[0054] The above materials are added to a high-speed mixer and mixed for 6 minutes. The mixed materials are then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0055] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0056] 2) Preparation of high-strength, aging-resistant artificial turf fibers:

[0057] Metallocene polyethylene (melt index 0.8 g / 10 min, density 0.914 g / cm³) 3 40kg of linear low-density polyethylene (melt index 2g / 10min, density 0.918g / cm³). 3 47kg, functional masterbatch 5kg, green masterbatch 3kg.

[0058] After the above materials are mixed evenly in proportion, a diamond-shaped mold is set in the plastic extrusion drawing unit. Through melt extrusion, cooling, stretching, shaping, winding, twisting, etc., extruded diamond-shaped high-strength and aging-resistant artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0059] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0060] 3) Preparation of high-strength, aging-resistant artificial turf;

[0061] The extruded diamond-shaped high-strength and aging-resistant artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain high-strength artificial turf.

[0062] Example 3

[0063] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0064] 1) Preparation of functional masterbatch:

[0065] Includes: 41.2 kg of base PE resin (melt index 10 g / 10 min), 1.5 kg of UV absorber UV-327, 5.3 kg of light stabilizer 625, 50 kg of nano titanium dioxide (particle size 100 nm), and 2 kg of titanate coupling agent.

[0066] The above materials are added to a high-speed mixer and mixed for 6 minutes. The mixed materials are then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0067] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0068] 2) Preparation of high-strength, aging-resistant artificial turf fibers:

[0069] Metallocene polyethylene (melt index 0.8 g / 10 min, density 0.914 g / cm3) 60 kg, linear low-density polyethylene (melt index 2 g / 10 min, density 0.918 g / cm3) 27 kg, functional masterbatch 10 kg, green masterbatch 3 kg.

[0070] After the above materials are mixed evenly in proportion, a diamond-shaped mold is set in the plastic extrusion drawing unit. Through melt extrusion, cooling, stretching, shaping, winding, twisting, etc., extruded diamond-shaped high-strength and aging-resistant artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0071] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0072] 3) Preparation of high-strength, aging-resistant artificial turf:

[0073] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain a high-strength artificial turf.

[0074] Example 4

[0075] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0076] 1) Preparation of functional masterbatch:

[0077] Includes: PE resin (melt index 10g / 10min): 47.5kg, antioxidant 10102kg, light stabilizer 20203kg, nano zinc oxide (particle size 20nm): 40kg, zinc stearate 2.5kg, PE wax 5kg.

[0078] The above materials are added to a high-speed mixer and mixed for 6 minutes. The mixed materials are then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0079] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0080] 2) Preparation of high-strength turf fibers:

[0081] Metallocene polyethylene (melt index 0.8 g / 10 min, density 0.914 g / cm3) 20 kg, linear low-density polyethylene (melt index 2 g / 10 min, density 0.918 g / cm3) 62 kg, functional masterbatch 10 kg, green masterbatch 8 kg.

[0082] After the above materials are mixed evenly in proportion, a diamond-shaped mold is configured in the plastic extrusion drawing unit. Through melt extrusion, cooling, stretching, shaping, winding, twisting, etc., extruded diamond-shaped high-strength and aging-resistant artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0083] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0084] 3) Preparation of high-strength, aging-resistant artificial turf:

[0085] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain a high-strength artificial turf.

[0086] Example 5

[0087] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0088] 1) Preparation of functional masterbatch:

[0089] The following components are included: PE resin (melt index 7 g / 10 min) 58.4 kg, antioxidant 225 2.5 kg, UV absorber UV-32 63.5 kg, light stabilizer 202 05 kg, nano titanium dioxide (particle size 10 nm) 10 kg, nano cerium oxide (particle size 100 nm) 10 kg, sodium hexametaphosphate 0.6 kg, and PE wax 1 kg.

[0090] The above materials are added to a high-speed mixer and mixed for 8 minutes. The mixed materials are then fed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0091] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 25 r / min.

[0092] 2) Preparation of high-strength, aging-resistant turf fibers:

[0093] Metallocene polyethylene (melt index 3.8 g / 10 min, density 0.912 g / cm3) 40 kg, linear low-density polyethylene (melt index 2.3 g / 10 min, density 0.917 g / cm3) 49 kg, functional masterbatch 5 kg, green masterbatch 6 kg.

[0094] After the above materials are mixed evenly in proportion, a diamond-shaped mold is configured in the plastic extrusion drawing unit. Through melt extrusion, cooling, stretching, shaping, winding, twisting, etc., extruded diamond-shaped high-strength and aging-resistant artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0095] The draw ratio is 5.8, the hot draw temperature is 98℃, the treatment temperature is 105℃, and the relaxation heat treatment ratio is 25%.

[0096] 3) Preparation of high-strength, aging-resistant artificial turf:

[0097] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain a high-strength artificial turf.

[0098] Example 6

[0099] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0100] 1) Preparation of functional masterbatch:

[0101] The matrix PE resin (melt index 10g / 10min) is 69kg, antioxidant is 2152kg, light stabilizer is 1194kg, light stabilizer is 6224kg, nano titanium dioxide (particle size 100nm) is 20kg, and sodium hexametaphosphate is 1kg.

[0102] The above materials are added to a high-speed mixer and mixed for 8 minutes. The mixed materials are then fed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0103] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0104] 2) Preparation of high-strength turf fibers:

[0105] Metallocene polyethylene (melt index 3.8 g / 10 min, density 0.912 g / cm³) 3 50 kg of linear low-density polyethylene (melt index 2.5 g / 10 min, density 0.935 g / cm³). 3 34kg, functional masterbatch 8kg, green masterbatch 8kg.

[0106] After the above materials are mixed evenly in proportion, a diamond-shaped mold is configured in the plastic extrusion drawing unit. Through melt extrusion, cooling, stretching, shaping, winding, twisting, etc., extruded diamond-shaped high-strength and aging-resistant artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0107] The draw ratio is 5.6 times, the hot draw temperature is 98℃, the treatment temperature is 110℃, and the relaxation heat treatment ratio is 15%.

[0108] 3) Preparation of high-strength, aging-resistant artificial turf:

[0109] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain a high-strength artificial turf.

[0110] Example 7

[0111] This embodiment describes the preparation of a high-strength, aging-resistant artificial turf, specifically including:

[0112] 1) Preparation of functional masterbatch:

[0113] Matrix PE resin (melt index 10g / 10min): 69kg, antioxidant 2152kg, light stabilizer 9448kg, nano titanium dioxide (particle size 50nm): 20kg, sodium hexametaphosphate 1kg.

[0114] The above materials are added to a high-speed mixer and mixed for 8 minutes. The mixed materials are then extruded and granulated in a twin-screw extruder to obtain functional masterbatch.

[0115] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0116] 2) Preparation of high-strength turf fibers:

[0117] Metallocene polyethylene (melt index 3.8 g / 10 min, density 0.912 g / cm³) 3 50 kg of linear low-density polyethylene (melt index 2.5 g / 10 min, density 0.935 g / cm³). 3 34kg, functional masterbatch 8kg, green masterbatch 8kg.

[0118] After the above materials are mixed evenly in proportion, a T-shaped flat die head is configured in the plastic extrusion drawing unit. After melt extrusion, cooling, slitting, stretching, shaping, opening, winding, twisting, etc., a mesh artificial turf fiber with DTEX of 8800 and a thickness of 140um is obtained.

[0119] The draw ratio is 6 times, the hot draw temperature is 105℃, the treatment temperature is 120℃, the relaxation heat treatment ratio is 10%, and the lawn netting device uses imported blades and needle strips to cut and form the shape in one go, replacing the traditional needle netting or the method of installing individual blades piece by piece. The lawn fiber netting has a clean appearance without burrs.

[0120] 3) Preparation of high-strength, aging-resistant artificial turf:

[0121] The aforementioned DTEX 8800 mesh artificial turf fibers are tufted onto the artificial turf base fabric. An adhesive layer is then coated onto the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain a high-strength artificial turf.

[0122] Comparative Example 1

[0123] This comparative example prepares an artificial turf, specifically including:

[0124] 1) Preparation of functional masterbatch:

[0125] Includes: 79.7 kg of base PE resin (melt index 10 g / 10 min), 2152 kg of antioxidant, 7838 kg of light stabilizer, 10 kg of nano titanium dioxide (particle size 10 nm), and 0.3 kg of titanate coupling agent.

[0126] The above materials are added to a high-speed mixer and mixed for 6 minutes. The mixed materials are then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0127] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0128] 2) Preparation of artificial turf fibers:

[0129] Linear low-density polyethylene (melt index 2 g / 10 min, density 0.918 g / cm³) 3 87kg, functional masterbatch 10kg, green masterbatch 3kg.

[0130] After the above materials are mixed evenly in proportion, a diamond-shaped mold is configured in the plastic extrusion drawing unit. Through operations such as melt extrusion, cooling, stretching, shaping, winding, and twisting, extruded diamond-shaped artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0131] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0132] 3) Preparation of artificial turf:

[0133] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain the artificial turf.

[0134] Comparative Example 2:

[0135] This comparative example prepares an artificial turf, specifically including:

[0136] 1) Preparation of functional masterbatch:

[0137] Includes: PE resin (melt index 10g / 10min): 90kg, antioxidant 2152kg, light stabilizer 7838kg.

[0138] The above materials are added to a high-speed mixer and mixed for 6 minutes. The mixed materials are then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch.

[0139] The temperature in each zone of the twin-screw extruder is between 140-260℃, and the screw speed is 20r / min.

[0140] 2) Preparation of artificial turf fibers:

[0141] Metallocene polyethylene (melt index 0.8 g / 10 min, density 0.914 g / cm³) 3 20 kg of linear low-density polyethylene (melt index 2 g / 10 min, density 0.918 g / cm³). 3 67kg, functional masterbatch 10kg, green masterbatch 3kg.

[0142] After the above materials are mixed evenly in proportion, a diamond-shaped mold is configured in the plastic extrusion drawing unit. Through operations such as melt extrusion, cooling, stretching, shaping, winding, and twisting, extruded diamond-shaped artificial turf fiber with DTEX of 12000 / 6F is obtained.

[0143] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0144] 3) Preparation of artificial turf:

[0145] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated on the bottom of the artificial turf base fabric, and the adhesive is dried and cured in a hot oven to obtain the artificial turf.

[0146] Comparative Example 3:

[0147] This comparative example prepares an artificial turf, specifically including:

[0148] 1) Preparation of functional masterbatch:

[0149] 92 kg of base PE resin and 8 kg of light stabilizer 944 were added to a high-speed mixer and mixed for 8 minutes. The mixed material was then extruded and granulated in a twin-screw extruder to obtain functional masterbatch.

[0150] 2) Preparation of artificial turf fibers:

[0151] Linear low-density polyethylene (melt index 2.0 g / 10 min, density 0.918 g / cm³) 3 87kg, functional masterbatch 10kg, green masterbatch 3kg.

[0152] After the above materials are mixed evenly in proportion, a diamond-shaped mold is set in the plastic extrusion drawing unit, and extrusion, cooling, stretching, shaping, winding, twisting, etc. are carried out to obtain extruded diamond-shaped artificial turf fiber with DTEX of 12000 / 6F.

[0153] The drawing ratio is 5.5 times, the hot drawing temperature is 98℃, the treatment temperature is 100℃, and the relaxation heat treatment ratio is 20%.

[0154] 3) Preparation of artificial turf:

[0155] The extruded diamond-shaped artificial turf fibers with DTEX of 12000 / 6F are tufted onto the artificial turf base fabric. Then, an adhesive layer is coated under the base fabric, and the adhesive is dried and cured in a hot oven to obtain the artificial turf.

[0156] Comparative Example 4

[0157] This comparative example prepares an artificial turf, specifically including:

[0158] 1) Preparation of functional masterbatch:

[0159] 92 kg of base PE resin and 8 kg of light stabilizer 944 were added to a high-speed mixer and mixed for 6 minutes. The mixed material was then extruded and granulated in a twin-screw extruder to obtain functional masterbatch.

[0160] 2) Preparation of artificial turf fibers:

[0161] Linear low-density polyethylene (melt index 2.0 g / 10 min, density 0.918 g / cm³) 3 82kg, functional masterbatch 10kg, green masterbatch 8kg.

[0162] After the above materials are mixed evenly in proportion, a T-shaped flat die head is configured in the plastic extrusion and drawing unit. After melt extrusion, cooling, slitting, stretching, shaping, opening, winding, twisting, etc., a mesh artificial turf fiber with DTEX of 8800 is obtained.

[0163] The drawing ratio is 6 times, the hot drawing temperature is 105℃, the treatment temperature is 120℃, and the relaxation heat treatment ratio is 10%.

[0164] 3) Preparation of artificial turf:

[0165] The aforementioned DTEX 8800 mesh artificial turf fibers are tufted onto the artificial turf base fabric, and then an adhesive layer is coated under the base fabric. The adhesive is then dried and cured in a hot oven to obtain the artificial turf.

[0166] Example 8

[0167] Performance testing

[0168] Project 1: Abrasion Resistance Test

[0169] The abrasion resistance of the turf was tested in accordance with the requirements of FIFA Handbook 2015, the FIFA Artificial Turf Quality Program standard.

[0170] Project Two: UV Testing

[0171] The UV resistance of turf fibers was tested according to ISO 4892-3 standard, with a total testing time of 5000 hours.

[0172] Project 3: Tensile Strength

[0173] The tensile strength of turf fibers was tested according to standard EN13864-2004.

[0174] Item 4: Shrinkage Rate

[0175] Take 100cm of lawn fiber and place it in a hot drying oven. Set the oven temperature to 90℃ and the test time to 5 minutes. After the test, remove the lawn fiber and allow it to cool naturally to room temperature. Measure the fiber length and record it as L (cm). The yarn shrinkage rate η (%) is calculated using the following formula:

[0176]

[0177] Table 1 shows a detailed comparison of the performance test results of Examples 1-7 and Comparative Examples 1-4:

[0178] Table 1

[0179]

[0180] The test results above show that, compared with the prior art, the high-strength, aging-resistant artificial turf obtained by the embodiments of the present invention has significant improvements in mechanical strength, UV stability, strength retention rate, heat shrinkage rate, and wear resistance.

[0181] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-strength, aging-resistant artificial turf fiber, characterized in that, It is prepared from the following components in the indicated weight percentages: Metallocene polyethylene 20-60%; Linear low-density polyethylene 27-67%; Functional masterbatch 5-10%; Masterbatch 3-8%; The functional masterbatch comprises the following components by weight percentage: 38.8-79.7% matrix PE resin, 5-20% UV aging aid, 10-50% inorganic filler, and 0.3-7.5% processing aid; the inorganic filler is nanoscale. Furthermore, the fiber preparation method includes mixing the above components evenly, followed by melt extrusion, cooling, stretching, and shaping, wherein the stretching ratio is 4-8 times and the relaxation heat treatment ratio is 1-30%. The inorganic filler is one or more of nano-titanium oxide, nano-zinc oxide, and nano-cerium oxide; The linear low-density polyethylene is any linear low-density polyethylene other than metallocene polyethylene.

2. The high-strength, aging-resistant artificial turf fiber according to claim 1, characterized in that, The metallocene polyethylene has a melt index of 0.1-10 g / 10 min and a density of 0.900-0.940 g / cm³. 3 ; And / or, the linear low-density polyethylene has a melt index of 0.5-10 g / 10 min and a density of 0.910-0.940 g / cm³. 3 .

3. The high-strength, aging-resistant artificial turf fiber according to claim 1, characterized in that, The metallocene polyethylene has a melt flow index of 0.8-4 g / 10 min and a density of 0.91-0.92 g / cm³. 3 ; And / or, the linear low-density polyethylene has a melt index of 0.8-4 g / 10 min and a density of 0.912-0.935 g / cm³. 3 .

4. The high-strength, aging-resistant artificial turf fiber according to claim 1, characterized in that, In the functional masterbatch: The UV aging aid is any two or three combinations of antioxidants, benzotriazole UV absorbers and hindered amine light stabilizers. And / or, the particle size of the inorganic filler is 10-200 nm; And / or, the processing aid is one or more of the following: coupling agent, liquid paraffin, polyethylene wax, calcium stearate, barium stearate, and sodium hexametaphosphate.

5. The high-strength, aging-resistant artificial turf fiber according to claim 1, characterized in that, The particle size of the inorganic filler is 20-50 nm.

6. A high-strength, aging-resistant artificial turf fiber according to any one of claims 1-5, characterized in that, The high-strength, aging-resistant artificial turf fiber has a tensile strength of ≥15cN / tex and a strength retention rate of >80% after UV aging.

7. The method for preparing high-strength, aging-resistant artificial turf fiber according to claim 6, characterized in that, Includes the following steps: 1) Preparation of functional masterbatch: The matrix PE resin, UV aging agent, inorganic filler and processing aid are added to a high-speed mixer in proportion and mixed for 5-8 minutes. The mixed material is then conveyed to a twin-screw extruder for extrusion granulation to obtain functional masterbatch. 2) Metallocene polyethylene, linear low-density polyethylene, functional masterbatch, and color masterbatch are mixed evenly in proportion and then melt-extruded, cooled, stretched, shaped, wound, and twisted in a plastic extrusion and drawing unit to obtain high-strength and aging-resistant artificial turf fibers. The draw ratio is 4-8 times, and the relaxation heat treatment ratio is 1-30%.

8. A high-strength, aging-resistant artificial turf, characterized in that, It includes the high-strength, aging-resistant artificial turf fiber as described in any one of claims 1-5 or the high-strength, aging-resistant artificial turf fiber obtained by the preparation method described in claim 7.

9. The method for preparing high-strength, aging-resistant artificial turf according to claim 8, characterized in that, The high-strength, age-resistant artificial turf fibers are tufted or woven onto the artificial turf base fabric, and the bottom of the artificial turf base fabric is coated with an adhesive. The high-strength, age-resistant artificial turf is obtained by drying and curing.

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