High temperature resistant artificial grass yarn and preparation method thereof, and artificial turf

Abstract

The invention discloses a heat-resistant artificial turf yarn and a preparation method thereof, comprising the following raw materials in parts by weight: 40-60 parts of matte masterbatch, 40-60 parts of low-density polyethylene particles, 4-8 parts of masterbatch, 1-3 parts of lubricant and 1-3 parts of first anti-aging agent; the masterbatch comprises chromium oxide green with high reflectivity to infrared rays, and does not comprise carbon black and zinc iron yellow, so as to reduce the absorption of sunlight heat by the artificial turf yarn, and avoid the use of zinc iron yellow and carbon black pigments that absorb heat, so that the artificial turf yarn of the invention has a slower heating rate and a lower maximum temperature when exposed to the sun compared with the existing artificial turf yarn; on the other hand, the invention further adds matte masterbatch to the raw materials, so that the prepared artificial turf yarn has a matte appearance and a more realistic color; the application also discloses an artificial turf comprising the heat-resistant artificial turf yarn, which has excellent wear resistance and temperature resistance, and a slower heating rate and a lower maximum temperature when exposed to the sun, so that the artificial turf yarn is particularly suitable as an artificial turf for sports fields.

Description

Technical Field

[0001] The present invention belongs to the technical field of artificial turf, and particularly relates to a high-temperature-resistant artificial grass fiber, a preparation method thereof, and an artificial turf. Background Art

[0002] Artificial turf has the advantages of evergreen all year round, beautiful and durable, less maintenance times, and all-weather use, and is more and more popular among people. Artificial turf can be classified into sports artificial turf and leisure artificial turf according to its use. Leisure artificial turf is artificial turf used for landscape greening or for roof heat insulation. Sports artificial turf is mostly applied to use scenarios where the grass fibers are frequently worn, such as playgrounds and sports fields, and is specifically used for various sports events.

[0003] First of all, compared with natural turf, the heating rate of exposed artificial turf is faster, and the highest temperature of exposure is also higher than that of natural turf. Because natural turf has the function of self-regulating humidity, when the temperature is too high, it can reduce the surface temperature of the turf by evaporating the water in the natural turf; while artificial turf is not a plant containing water, it will only directly absorb the sunlight heat and convert it into heat energy, resulting in a higher surface temperature of artificial turf. Especially in hot summer, the surface temperature of artificial turf can reach about 80 degrees Celsius. When people exercise or play on the turf, they are easily scalded. Therefore, how to reduce the surface temperature of artificial turf is a technical problem to be solved urgently.

[0004] Secondly, the existing artificial grass fiber products have strong reflectivity and poor realism. Moreover, the matrix resin of the existing artificial grass fiber is low-density polyethylene. After being exposed to a drying tunnel or the sun in summer, the tips of the artificial grass fibers are prone to bending. The bent tips of the grass fibers will cause color differences in the visual effect after the artificial turf is laid, affecting the quality of the artificial turf.

[0005] Finally, the existing artificial grass fibers have poor wear resistance. The use frequency of sports artificial turf is relatively high and the wear is frequent, and the service life of the artificial grass fibers will be further shortened. Therefore, sports artificial turf also needs to have excellent wear resistance to serve sports. Summary of the Invention

[0006] In view of the problems in the related art, the present invention provides a high-temperature-resistant artificial grass fiber and a preparation method thereof to overcome the above technical problems existing in the related art.

[0007] The technical solution of the present invention is realized as follows:

[0008] A high-temperature-resistant artificial grass fiber comprises the following raw materials in parts by weight: 40-60 parts of matte masterbatch, 40-60 parts of low-density polyethylene particles, 4-8 parts of color masterbatch, 1-3 parts of slip agent, and 1-3 parts of first anti-aging agent.

[0009] The masterbatch contains chromium oxide green with a high infrared reflectivity and does not contain carbon black and zinc iron yellow.

[0010] Existing artificial grass filaments generally contain zinc iron yellow and / or carbon black in order to modulate the target color, and both of these two pigments, zinc iron yellow and carbon black, will absorb heat. In the present invention, chromium oxide green with a high infrared reflectivity is added to the masterbatch to reduce the absorption of sunlight heat by the artificial grass filaments. At the same time, the use of heat-absorbing zinc iron yellow and carbon black pigments is avoided, so that the artificial grass filaments of the present invention have a slower heating rate and a lower maximum temperature when exposed to sunlight compared with existing artificial grass filaments. On the other hand, the present invention also adds a matte masterbatch to the raw materials, making the produced artificial grass filaments appear matte and the color more realistic.

[0011] Preferably, the masterbatch contains the following raw materials in parts by weight: 60 - 70 parts of polyethylene powder, 30 - 40 parts of chromium oxide green with a high infrared reflectivity, and 0.5 - 3.5 parts of dispersant.

[0012] Specifically, the chromium oxide green with a high infrared reflectivity is chromium oxide green of model 2630k produced by Foshan Zhongda Pigment Co., Ltd.

[0013] Specifically, the dispersant is polyethylene wax or EBS dispersant. The polyethylene wax can be well compatible with polyethylene, and at the same time has excellent internal lubrication effect on polyethylene, which is beneficial to the preparation of the matte masterbatch by mixing materials and is also beneficial to improving the processing performance of the matte masterbatch, facilitating the subsequent production of high-temperature-resistant artificial grass filaments; while the EBS dispersant has excellent internal and external lubrication effects, and at the same time has good dispersion performance for the relatively difficult-to-disperse chromium oxide green used in the present invention.

[0014] Preferably, the matte masterbatch contains the following raw materials in parts by weight: 30 - 50 parts of solid glass microspheres, 45 - 70 parts of low-density polyethylene, 0.5 - 3.5 parts of dispersant, and 0.5 - 3.5 parts of a second anti-aging agent.

[0015] The advantages of using solid glass microsphere masterbatch to fill polyethylene to prepare artificial grass filaments in the present invention are as follows: First, the solid glass microspheres are rigid particles and have lipophilic and hydrophobic properties, which can be well dispersed in polyethylene, playing a role in supporting the soft polyethylene and making the produced artificial grass filaments straight and shaped. Second, the produced artificial grass filaments appear matte and the color is more realistic. Third, the addition of solid glass microspheres also improves the temperature resistance and wear resistance of the artificial grass filaments, making the artificial grass filaments not easy to bend and wear, and improving the service life. Finally, the form of preparing polyethylene masterbatch wrapped with solid glass microspheres can make the solid glass microspheres better mixed with the matrix resin of the artificial grass filaments uniformly in the subsequent processing steps, making the solid glass microspheres evenly distributed in the artificial grass filaments, and also having the advantage of convenient storage.

[0016] Preferably, the low-density polyethylene includes 30-50 parts of low-density polyethylene particles and 15-20 parts of low-density polyethylene powder. Considering that the solid glass microspheres are made into masterbatch form for the convenience of subsequent processing to ensure uniform mixing, during extrusion granulation, the solid glass microspheres should also be evenly distributed in each masterbatch as much as possible. If polyethylene particles and solid glass microspheres are directly mixed, most of the solid glass microspheres will gather at the lower part of the mixed material during mixing, resulting in uneven distribution of the solid glass microspheres in the matte masterbatch during extrusion granulation. The addition of low-density polyethylene powder can fill the gaps between the low-density polyethylene particles, hinder the sinking of the solid glass microspheres as much as possible. At the same time, the low-density polyethylene powder can also melt relatively quickly during the initial heating and mixing process, quickly increasing the viscosity of the mixed material, which also has the effect of preventing the solid glass microspheres from sinking.

[0017] Preferably, the solid glass microspheres have a particle size of 600-3000 mesh.

[0018] Specifically, the second anti-aging agent is an ultraviolet absorber, which can preferably extend and protect the color of artificial grass fiber products mainly made of polyethylene.

[0019] Specifically, the second anti-aging agent used in the present invention is YISTAB® UV-430 of Guangzhou Zhiyi Chemical Co., Ltd., which has excellent heat resistance and ultraviolet absorption functions, can absorb most of the ultraviolet light in the UVB band, and can effectively inhibit the photodegradation of polymer materials, enhancing the color stability of artificial grass fibers.

[0020] The dispersant is polyethylene wax or EBS dispersant.

[0021] The polyethylene wax can be well compatible with polyethylene, and at the same time has excellent internal lubrication effect on polyethylene, which is beneficial to mixing and preparing the matte masterbatch, and is also beneficial to improving the processing performance of the matte masterbatch, facilitating the subsequent production of high-temperature-resistant artificial grass fibers. The EBS dispersant has excellent internal and external lubrication effects, which can improve the finished product quality and processability of the matte masterbatch.

[0022] Preferably, the slip agent is a PPA processing aid or erucamide;

[0023] The PPA processing aid is a masterbatch with lubricating function. Without affecting the mechanical properties of artificial grass fibers, it can effectively improve the opening property, significantly shorten the transition time required for artificial grass fibers to switch to the target color, and improve the color stability of artificial grass fibers.

[0024] Erucamide has the advantages of strong slipperiness, less precipitation, high temperature resistance and not easy to turn yellow.

[0025] The first anti-aging agent is an antioxidant and / or a light stabilizer.

[0026] Specifically, the antioxidant is Tiangang® AO-B225 antioxidant of Beijing Tiangang Auxiliary Co., Ltd., which is a compound antioxidant and can be used for various high molecular materials such as polyolefins and engineering plastic products, effectively preventing thermal-oxidative aging during the processing and long-term use, and achieving the purpose of extending the service life of products.

[0027] Specifically, the light stabilizer is Tiangang® HS-944 light stabilizer of Beijing Tiangang Auxiliary Co., Ltd., which has a unique molecular structure, a relatively high and appropriate relative molecular mass. In addition to excellent light stabilization, it also has the effect of resisting thermal-oxidative aging. When used in combination with the above-mentioned Tiangang® AO-B225 antioxidant, it can effectively extend the outdoor use time of artificial grass filaments.

[0028] The present invention also discloses a preparation method of high-temperature-resistant artificial grass filaments, which includes the following steps:

[0029] (1) According to the above-mentioned high-temperature-resistant artificial grass filaments, configure the raw materials. The raw materials of the masterbatch are first extruded and granulated by a twin-screw extruder, the temperature is set at 190 - 200 °C, and after co-extrusion - underwater pelletizing - drying, the masterbatch is obtained;

[0030] (2) The raw materials of the matte masterbatch are first extruded and granulated by a twin-screw extruder, the temperature is set at 190 - 200 °C, and after co-extrusion - underwater pelletizing - drying, the matte masterbatch is obtained;

[0031] (3) Then mix the masterbatch, matte masterbatch and other raw materials, set the temperature at 230 - 240 °C, and the draw ratio is 5 - 6 times. After co-extrusion - traction - drawing - shaping - winding - twisting, high-temperature-resistant artificial grass filaments are obtained.

[0032] The present invention also discloses a high-temperature-resistant artificial turf including the above-mentioned high-temperature-resistant artificial grass filaments. Since this high-temperature-resistant artificial grass filament has excellent wear and temperature resistance compared with the existing artificial turf, and has a slower heating rate and a lower maximum temperature during sun exposure, it is particularly suitable as the artificial turf for sports fields. Description of the Drawings

[0033] Figure 1 It is the product drawing after baking of Example 2 of the present invention;

[0034] Figure 2 It is the product drawing after baking of Comparative Example 1 of the present invention. Detailed Embodiments

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0036] Example 1

[0037] A high-temperature resistant artificial grass fiber contains the following raw materials in parts by weight: 40 parts of matte masterbatch, 40 parts of low-density polyethylene particles, 4 parts of color masterbatch, 1 part of slip agent (erucamide), and 1 part of first anti-aging agent.

[0038] The color masterbatch contains the following raw materials in parts by weight: 60 parts of polyethylene powder, 30 parts of chromium oxide green with high infrared reflectivity (model 2630k, Foshan Zhongda Pigment Co., Ltd.), and 0.5 part of dispersant (polyethylene wax).

[0039] The matte masterbatch contains the following raw materials in parts by weight: 30 parts of solid glass microspheres (particle size 600 mesh), 45 parts of low-density polyethylene (including 40 particles and 15 powders), 0.5 part of dispersant (polyethylene wax), and 0.5 part of second anti-aging agent (ultraviolet absorber YISTAB® UV-430, Guangzhou Zhiyi Chemical Co., Ltd.).

[0040] The first anti-aging agent is made by mixing antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0041] A preparation method of a high-temperature resistant artificial grass fiber includes the following steps:

[0042] (1) Configure the raw materials according to the above high-temperature resistant artificial grass fiber. The raw materials of the color masterbatch are first extruded and pelletized by a twin-screw extruder, the temperature is set at 190 °C, and after co-mixing extrusion - water cutting - drying, the color masterbatch is obtained;

[0043] (2) The raw materials of the matte masterbatch are first extruded and pelletized by a twin-screw extruder, the temperature is set at 190 °C, and after co-mixing extrusion - water cutting - drying, the matte masterbatch is obtained;

[0044] (3) Then mix the color masterbatch, matte masterbatch and other raw materials, set the temperature at 230 °C, the draw ratio is 5 times, and after co-mixing extrusion - traction - drawing - shaping - winding - twisting, the high-temperature resistant artificial grass fiber is obtained.

[0045] Example 2

[0046] A high-temperature resistant artificial grass fiber, comprising the following raw materials in parts by weight: 50 parts of matte masterbatch, 50 parts of low-density polyethylene particles, 6 parts of color masterbatch, 2 parts of slip agent (PPA processing aid), and 2 parts of first anti-aging agent.

[0047] The color masterbatch comprises the following raw materials in parts by weight: 65 parts of polyethylene powder, 35 parts of chromium oxide green with high infrared reflectivity (model 2630k, Foshan Zhongda Pigment Co., Ltd.), and 2 parts of dispersant (EBS dispersant).

[0048] The matte masterbatch comprises the following raw materials in parts by weight: 40 parts of solid glass microspheres (particle size 1800 mesh), 58 parts of low-density polyethylene (including 40 parts of particles and 18 parts of powder), 2 parts of dispersant (EBS dispersant), and 2 parts of second anti-aging agent (ultraviolet absorber YISTAB® UV-430, Guangzhou Zhiyi Chemical Co., Ltd.).

[0049] The first anti-aging agent is made by mixing antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0050] A preparation method of the high-temperature resistant artificial grass fiber, comprising the following steps:

[0051] (1) According to the above-mentioned high-temperature resistant artificial grass fiber, configure the raw materials. The raw materials of the color masterbatch are first extruded and pelletized by a twin-screw extruder, the temperature is set at 195 °C, and after co-extrusion - water cutting - drying, the color masterbatch is obtained;

[0052] (2) The raw materials of the matte masterbatch are first extruded and pelletized by a twin-screw extruder, the temperature is set at 195 °C, and after co-extrusion - water cutting - drying, the matte masterbatch is obtained;

[0053] (3) Then mix the color masterbatch, matte masterbatch and other raw materials, the temperature is set at 235 °C, the draw ratio is 5.5 times, and after co-extrusion - traction - drawing - shaping - winding - twisting, the high-temperature resistant artificial grass fiber is obtained.

[0054] Example 3

[0055] A high-temperature resistant artificial grass fiber, comprising the following raw materials in parts by weight: 60 parts of matte masterbatch, 60 parts of low-density polyethylene particles, 8 parts of color masterbatch, 3 parts of slip agent (PPA processing aid), and 3 parts of first anti-aging agent.

[0056] The color masterbatch comprises the following raw materials in parts by weight: 70 parts of polyethylene powder, 40 parts of chromium oxide green with high infrared reflectivity (model 2630k, Foshan Zhongda Pigment Co., Ltd.), and 3.5 parts of dispersant (EBS dispersant).

[0057] The matte masterbatch contains the following raw materials in parts by weight: 50 parts of solid glass microspheres (particle size 3000 mesh), 70 parts of low-density polyethylene (including 50 parts of pellets and 20 parts of powders), 3.5 parts of dispersant (polyethylene wax), and 3.5 parts of second anti-aging agent (ultraviolet absorber YISTAB® UV-430, Guangzhou Zhiyi Chemical Co., Ltd.).

[0058] The first anti-aging agent is made by mixing antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0059] A preparation method of high-temperature-resistant artificial grass filaments includes the following steps:

[0060] (1) According to the above-mentioned high-temperature-resistant artificial grass filaments, configure the raw materials. First, extrude and pelletize the raw materials of the color masterbatch with a twin-screw extruder at a temperature of 200 °C. After co-mixing extrusion - water cutting - drying, the color masterbatch is obtained;

[0061] (2) First, extrude and pelletize the raw materials of the matte masterbatch with a twin-screw extruder at a temperature of 200 °C. After co-mixing extrusion - water cutting - drying, the matte masterbatch is obtained;

[0062] (3) Then mix the color masterbatch, matte masterbatch and other raw materials at a temperature of 240 °C and a draw ratio of 6 times. After co-mixing extrusion - traction - drawing - shaping - winding - twisting, the high-temperature-resistant artificial grass filaments are obtained.

[0063] Comparative Example 1

[0064] An artificial grass filament contains the following raw materials in parts by weight: 50 parts of matte masterbatch, 50 parts of low-density polyethylene pellets, 6 parts of color masterbatch, 2 parts of lubricant (PPA processing aid), and 2 parts of first anti-aging agent.

[0065] The color masterbatch is a conventional color masterbatch purchased commercially, and this color masterbatch contains zinc iron yellow and carbon black.

[0066] The matte masterbatch contains the following raw materials in parts by weight: 40 parts of solid glass microspheres (particle size 1800 mesh), 58 parts of low-density polyethylene (including 40 parts of pellets and 18 parts of powders), 2 parts of dispersant (EBS dispersant), and 2 parts of second anti-aging agent (ultraviolet absorber YISTAB® UV-430, Guangzhou Zhiyi Chemical Co., Ltd.).

[0067] The first anti-aging agent is prepared by mixing an antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and a light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0068] A method for preparing artificial grass filaments includes the following steps:

[0069] (1) Prepare raw materials according to the above-mentioned artificial grass filaments;

[0070] (2) First, the raw materials of the matte masterbatch are extruded and granulated by a twin-screw extruder with the temperature set at 195 °C. After co-extrusion - underwater pelletizing - drying, the matte masterbatch is obtained;

[0071] (3) Then, the color masterbatch, matte masterbatch and other raw materials are mixed with the temperature set at 235 °C and the draw ratio of 5.5 times. After co-extrusion - traction - drawing - shaping - winding - twisting, artificial grass filaments are obtained.

[0072] Comparative Example 2

[0073] An artificial grass filament contains the following raw materials in parts by weight: 50 parts of matte masterbatch, 50 parts of low-density polyethylene particles, 6 parts of color masterbatch, 2 parts of slip agent (PPA processing aid) and 2 parts of the first anti-aging agent.

[0074] The color masterbatch contains the following raw materials in parts by weight: 65 parts of polyethylene powder, 35 parts of chromium oxide green (commercially available conventional chromium oxide green pigment) and 2 parts of dispersant (EBS dispersant).

[0075] The matte masterbatch contains the following raw materials in parts by weight: 40 parts of solid glass microspheres (particle size of 1800 mesh), 58 parts of low-density polyethylene (including 40 parts of particles and 18 parts of powder), 2 parts of dispersant (EBS dispersant) and 2 parts of the second anti-aging agent (ultraviolet absorber YISTAB® UV-430, Guangzhou Zhiyi Chemical Co., Ltd.).

[0076] The first anti-aging agent is prepared by mixing an antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and a light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0077] A method for preparing artificial grass filaments includes the following steps:

[0078] (1) Prepare raw materials according to the above-mentioned artificial grass filaments. First, the raw materials of the color masterbatch are extruded and granulated by a twin-screw extruder with the temperature set at 195 °C. After co-extrusion - underwater pelletizing - drying, the color masterbatch is obtained;

[0079] (2) The raw materials of the matte masterbatch are first extruded and pelletized by a twin-screw extruder at a temperature of 195°C. After co-mingled extrusion, underwater pelletizing, and drying, the matte masterbatch is obtained.

[0080] (3) Then, the color masterbatch, matte masterbatch, and other raw materials are mixed at a temperature of 235°C with a draw ratio of 5.5 times. After co-mingled extrusion, drawing, stretching, shaping, winding, and twisting, artificial grass filaments are obtained.

[0081] Comparative Example 3

[0082] An artificial grass filament comprising the following raw materials in parts by weight: 50 parts of low-density polyethylene pellets, 6 parts of color masterbatch, 2 parts of slip agent (PPA processing aid), and 2 parts of anti-aging agent.

[0083] The color masterbatch comprises the following raw materials in parts by weight: 65 parts of polyethylene powder, 35 parts of chromium oxide green with high infrared reflectivity (model 2630k, Foshan Zhongda Pigment Co., Ltd.), and 2 parts of dispersant (EBS dispersant).

[0084] The anti-aging agent is prepared by mixing an antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and a light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0085] A method for preparing an artificial grass filament, comprising the following steps:

[0086] (1) According to the above artificial grass filament, the raw materials are configured. The raw materials of the color masterbatch are first extruded and pelletized by a twin-screw extruder at a temperature of 195°C. After co-mingled extrusion, underwater pelletizing, and drying, the color masterbatch is obtained.

[0087] (2) Then, the color masterbatch and other raw materials are mixed at a temperature of 235°C with a draw ratio of 5.5 times. After co-mingled extrusion, drawing, stretching, shaping, winding, and twisting, artificial grass filaments are obtained.

[0088] Comparative Example 4

[0089] An artificial grass filament comprising the following raw materials in parts by weight: 50 parts of matte combination material, 50 parts of low-density polyethylene pellets, 6 parts of color masterbatch (chromium oxide green), 2 parts of slip agent (PPA processing aid), and 2 parts of first anti-aging agent.

[0090] The color masterbatch comprises the following raw materials in parts by weight: 65 parts of polyethylene powder, 35 parts of chromium oxide green with high infrared reflectivity (model 2630k, Foshan Zhongda Pigment Co., Ltd.), and 2 parts of dispersant (EBS dispersant).

[0091] The matte composite material contains the following raw materials in parts by weight: 40 parts of solid glass microspheres (particle size 1800 mesh), 58 parts of low-density polyethylene (including 40 parts of granules and 18 parts of powders), 2 parts of dispersant (EBS dispersant), and 2 parts of second anti-aging agent (ultraviolet absorber YISTAB® UV-430, Guangzhou Zhiyi Chemical Co., Ltd.).

[0092] The first anti-aging agent is made by mixing an antioxidant (Tiangang® AO-B225 antioxidant, Beijing Tiangang Auxiliary Co., Ltd.) and a light stabilizer (Tiangang® HS-944 light stabilizer, Beijing Tiangang Auxiliary Co., Ltd.) in a weight ratio of 1:2.

[0093] A preparation method of artificial grass filaments: Configure and mix raw materials according to the above composition and ratio, set the temperature at 235°C, the draw ratio at 5.5 times, and obtain artificial grass filaments through co-blending extrusion - traction - drawing - shaping - winding - twisting.

[0094] Performance testing

[0095] Make the artificial grass filaments described in Examples 1-3 and Comparative Examples 1-4 above and the base cloth into turf, and then apply glue through a back glue shaping machine to process and make an artificial lawn.

[0096] The artificial grass filaments use diamond monofilaments, with a specification of grass height 50mm, row spacing 5 / 8 inch, and needle density 15 needles / cm.

[0097] (1) Surface temperature test

[0098] The selected test weather is all in summer, sunny and cloudless, and the average temperature is higher than 36°C. Place Examples 1-3 and Comparative Examples 1-2 in a position exposed to full sunlight without shelter, starting from 7 am to 14 pm. Take the center point of the artificial lawn sample and the left and right sides symmetric about the center point, that is, three different positions for surface temperature measurement, and the temperature measurement times are at 10 am, 12 pm, and 14 pm respectively.

[0099]

[0100] (2) High-temperature resistance test and matte effect

[0101] Put Examples 1-3 and Comparative Example 1 into an oven at 95°C and bake for 5 minutes. Visually judge whether the tips of the artificial grass filaments are bent and whether they have a matte effect. Take photos of each example and comparative example at two angles for retention.

[0102] Test results:

[0103] The artificial grass filaments of Examples 1-3 all achieve a matte effect and there are basically no bends at the tips. Since the photos of Examples 1-3 are highly similar, the accompanying drawings only show the photo of Example 2, that is, as Figure 1 shown;

[0104] The artificial grass filaments of Comparative Example 3 have strong reflection and basically all have bends at the tips, that is, as Figure 2 shown.

[0105] (3)Wear resistance test

[0106] Examples 1-3 and Comparative Examples 3-4 were tested in accordance with GB / T20394-2019 "National Standard for Artificial Turf for Sports". The results are shown in the following table.

[0107] It should be noted that the data of "retained rate of filament breaking force" in the table were measured after the filaments had undergone an aging test.

[0108]

[0109] Based on the disclosure and teachings of the above specification, those skilled in the art to which the present invention pertains can also make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. In addition, although some specific terms are used in this specification, these terms are only for convenience of description and do not constitute any limitation to the present invention.

Claims

1. A high temperature resistant artificial turf, characterized in that: The material comprises the following parts by weight: 40-60 parts of matte masterbatch, 40-60 parts of low-density polyethylene particles, 4-8 parts of color masterbatch, 1-3 parts of lubricant and 1-3 parts of first anti-aging agent; The masterbatch contains chromium oxide green with high reflectivity to infrared rays, and does not contain carbon black and zinc iron yellow; The masterbatch comprises the following raw materials in parts by weight: 60-70 parts of polyethylene powder, 30-40 parts of chromium oxide green with high reflectivity to infrared rays, and 0.5-3.5 parts of dispersant; The matte masterbatch comprises the following raw materials in parts by weight: 30-50 parts of solid glass microspheres, 45-70 parts of low-density polyethylene, 0.5-3.5 parts of a dispersant and 0.5-3.5 parts of a second anti-aging agent; The low-density polyethylene comprises 30-50 parts of low-density polyethylene particles and 15-20 parts of low-density polyethylene powder; The solid glass microbeads have a particle size of 600-3000 mesh; The dispersant is polyethylene wax or EBS dispersant; The chromium oxide green with high reflectivity to infrared rays is chromium oxide green of model 2630k produced by Foshan Zhongda Pigment Co., Ltd.

2. The high temperature resistant artificial turf according to claim 1, characterized in that: The second anti-aging agent is an ultraviolet absorber.

3. The high temperature resistant artificial turf according to claim 1, characterized in that: The lubricant is a PPA processing aid or erucamide; the first anti-aging agent is an antioxidant and / or a light stabilizer.

4. A method for preparing high temperature resistant artificial turf, characterized in that: The following steps are involved: (1) According to any one of claims 1 to 3, the raw materials for the masterbatch are first extruded and granulated by a twin-screw extruder, the temperature is set at 190-200°C, and then blended, extruded, water-cut, and dried to obtain the masterbatch; (2) The raw materials of matte masterbatch are also extruded and granulated by a twin-screw extruder, and the temperature is set at 190-200°C. After blending, extrusion, water cutting and drying, matte masterbatch is obtained; (3) The color masterbatch, matte masterbatch and other raw materials are mixed, the temperature is set at 230-240° C., the draft ratio is 5-6 times, and the mixture is subjected to a process of co-extrusion-traction-stretching-setting-winding-twisting to obtain high temperature resistant artificial grass yarn.

5. A high temperature resistant artificial turf, characterized in that: The invention comprises the high temperature resistant artificial turf yarn as claimed in any one of claims 1 to 3.

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