Ultralow-curvature artificial turf and preparation method thereof

Abstract

The invention discloses an ultralow-curvature artificial turf and a preparation method thereof, which are different from the traditional artificial turf in that curved filaments are wrapped on straight filaments, and then the straight filaments and the curved filaments are fed and tufted on a base fabric through a bobbin to obtain the ultralow-curvature artificial turf. Wherein the straight-filament grass filaments are prepared from the following components in parts by weight: 80-90 parts of linear low-density polyethylene, 10-20 parts of linear high-density polyethylene, 3-8 parts of color master batches, 2-5 parts of an anti-aging aid and 1-3 parts of a processing aid; the crooked grass filaments are prepared from the following components in parts by weight: 85-95 parts of homo-polypropylene, 5-15 parts of linear low-density polyethylene, 4-7 parts of color master batches, 2-5 parts of an anti-aging aid and 1-3 parts of a processing aid. Notches of the artificial turf with the ultralow curvature are smoother, and the artificial turf is good in touch feeling; the treading is non-directional, the grass surface is fluffy, and the resilience is good; the effect is closer to that of natural grass; and meanwhile, the production process flow is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of artificial turf, and more specifically, particularly relates to an ultra-low curvature artificial turf; at the same time, the present invention also relates to a preparation method of the ultra-low curvature artificial turf. Background Art

[0002] Artificial turf refers to a chemical product with natural grass sports performance that is made by implanting synthetic fibers that imitate the shape of grass blades into a woven base fabric and applying a fixing coating on the back. Generally, artificial turf is used to replace natural turf, so artificial turf pursues high simulation. Curvature refers to the percentage of the height of the curved yarn to the height of the straight yarn in artificial turf. The curvature is divided into three levels: standard curvature, low curvature, and ultra-low curvature. The height of the curved yarn in the standard curvature lawn is less than 70% of the straight yarn; the height of the curved yarn in the low curvature lawn is 70%-90% of the straight yarn; and the height of the curved yarn in the ultra-low curvature lawn is more than 90% of the straight yarn. The current production method of artificial turf is to produce straight yarn and curved yarn, twist them separately, and then tuft the straight yarn and curved yarn onto the base fabric through the two yarn tubes of straight yarn and curved yarn respectively. The curvature of the artificial turf produced in this way is generally less than 70%. Since both straight and curved wires are twisted, the grass wires are greatly worn, and the artificial turf produced usually has uneven cuts, the grass wires feel rough, and the overall support of the turf is poor. Therefore, we propose an ultra-low curvature artificial turf and a preparation method thereof. Summary of the invention

[0003] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an ultra-low curvature artificial turf and a preparation method thereof. The difference from the traditional artificial turf is that the ultra-low curvature artificial turf is obtained by wrapping the curved yarn around the straight yarn, and then tufting the straight yarn and the curved yarn on the base fabric through a yarn tube.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] An ultra-low curvature artificial turf, the ultra-low curvature artificial turf is made of artificial grass yarn, a base fabric, glue and a support, the artificial grass yarn is tufted on the base fabric, the glue is coated on the back of the base fabric, one end of the artificial grass yarn passes through the base fabric and is fixed by the glue coated on the back of the base fabric;

[0006] The artificial grass yarn is made by wrapping straight yarn and curved yarn, the curved yarn is wrapped on the straight yarn, and the straight yarn and the curved yarn are tufted onto the base cloth by a yarn tube feeding method.

[0007] Preferably, the straight grass silk component is made of 80-90 parts of linear low-density polyethylene, 10-20 parts of linear high-density polyethylene, 3-8 parts of masterbatch, 2-5 parts of anti-aging additives, and 1-3 parts of processing aids in parts by mass.

[0008] Preferably, the curved grass silk component is made of 85-95 parts of homopolypropylene, 5-15 parts of linear low-density polyethylene, 4-7 parts of masterbatch, 2-5 parts of anti-aging aid, and 1-3 parts of processing aid in parts by mass, and the processing aid is composed of zinc silicate, environmentally friendly plasticizer, softener, talc, reinforcing agent, light stabilizer, metal ion passivator, dispersant, light shielding agent and sustained release agent.

[0009] Preferably, the glue component is prepared by uniformly mixing 50-70 parts by mass of styrene-butadiene latex, 2-5 parts of inorganic filler and an appropriate amount of deionized water, wherein the inorganic filler is composed of one or more of light calcium carbonate, heavy calcium carbonate powder and barium sulfate;

[0010] Preferably, the support is a polyurethane foam layer, in which a filler is mixed, and the filler is a mixed material of quartz sand and environmentally friendly particles in a ratio of 2:5. The environmentally friendly particles are prepared by mixing thermoplastic polyurethane elastomer, UV-resistant additive, kaolin, and titanium dioxide, and then processed by melt blending equipment to obtain thermoplastic elastomer particles. The base fabric is polypropylene fiber cloth.

[0011] A method for preparing an ultra-low curvature artificial turf, the method adopts the above-mentioned materials for preparation, and comprises the following steps:

[0012] S1. Preparation of curved grass silk materials: according to the formula of curved grass silk, weigh polypropylene, linear low-density polyethylene, masterbatch, anti-aging additives, and processing aids by weight;

[0013] S2, production of curved grass yarn, adding polypropylene, linear low-density polyethylene, masterbatch, anti-aging additives, and processing aids into a screw machine respectively, and performing blending, melt extrusion, traction, drawing, shaping, and winding in sequence, and finally obtaining curved grass yarn;

[0014] S3, straight grass yarn material preparation, according to the formula of straight grass yarn, weigh linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging additives, and processing aids by mass;

[0015] S4, making curved straight grass yarn, respectively adding them into a screw machine for blending, melt extrusion, pulling, drawing, and shaping in sequence, and then wrapping the prepared curved grass yarn around the straight grass yarn and winding it to obtain the curved straight grass yarn;

[0016] S5. Production of ultra-low curvature artificial turf: tuft the curved straight grass fibers onto the base fabric through the yarn tube feeding method, and evenly apply glue on the back of the base fabric and dry it. Finally, the base fabric is combined with a support to form an ultra-low curvature artificial turf.

[0017] Preferably, after the ultra-low curvature artificial turf is manufactured, the density of the turf needs to be tested, specifically:

[0018] Use an artificial turf densitometer to randomly select several test points from each square meter of turf, including at least 3 test points in the area 10 cm away from the edge of the ultra-low curvature artificial turf, and at least 3 test points in the center of the low curvature artificial turf at 80 cm × 80 cm;

[0019] The number of grass fibers at each test point was recorded, and a weighted calculation was performed based on the test points in different areas to obtain the density of the ultra-low curvature artificial turf.

[0020] Preferably, the density of the ultra-low curvature artificial turf is calculated as follows:

[0021]

[0022] Where P 草坪 is the density of ultra-low curvature artificial turf, P 边缘 is the density of the ultra-low curvature artificial turf 10 cm away from the edge, m is the number of samples in the ultra-low curvature artificial turf 10 cm away from the edge, P 中心 is the density at 80cm×80cm in the center of the low-curvature artificial turf, and n is the number of samples at 80cm×80cm in the center of the low-curvature artificial turf.

[0023] Technical effects and advantages of the present invention: The present invention provides an ultra-low curvature artificial turf and a preparation method thereof. Compared with the prior art, the present invention wraps the curved wire around the straight wire in the process of producing the straight wire drawing and winding, and then tufts the straight wire and the curved wire onto the base fabric through a yarn tube yarn feeding. Since the straight wire and the curved wire are not subjected to spiral deformation, the wear of the equipment on the grass wire during the twisting process is reduced, so that the cut of the produced artificial turf is smoother, smoother to the touch, and has a good touch.

[0024] In addition, artificial turf with ultra-low curvature has better support than artificial turf with standard curvature, is non-directional when stepped on, has a fluffy grass surface and good resilience, and is closer to the effect of natural grass. It also reduces the production process and improves production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The present invention is a flow chart of the method for preparing an ultra-low curvature artificial turf. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] The present invention provides an ultra-low curvature artificial turf, which is made of artificial grass yarn, a base fabric, glue and a support, wherein the artificial grass yarn is tufted on the base fabric, the glue is coated on the back of the base fabric, one end of the artificial grass yarn passes through the base fabric and is fixed by the glue coated on the back of the base fabric;

[0028] The artificial grass yarn is made by wrapping straight yarn and curved yarn, the curved yarn is wrapped on the straight yarn, and the straight yarn and the curved yarn are tufted onto the base cloth by a yarn tube feeding method.

[0029] Specifically, the straight grass silk component is made of 80-90 parts of linear low-density polyethylene, 10-20 parts of linear high-density polyethylene, 3-8 parts of masterbatch, 2-5 parts of anti-aging additives, and 1-3 parts of processing aids by weight;

[0030] The curved grass silk components are made of 85-95 parts of homopolymer polypropylene, 5-15 parts of linear low-density polyethylene, 4-7 parts of masterbatch, 2-5 parts of anti-aging additives, and 1-3 parts of processing aids by mass. The above-mentioned processing aids are composed of zinc silicate, environmentally friendly plasticizers, softeners, talcum powder, reinforcing agents, light stabilizers, metal ion passivators, dispersants, light shielding agents and sustained-release agents.

[0031] It should be noted that the glue component is made by uniformly mixing 50-70 parts of styrene-butadiene latex, 2-5 parts of inorganic filler and an appropriate amount of deionized water, and the inorganic filler is composed of one or more of light calcium carbonate, heavy calcium carbonate powder and barium sulfate.

[0032] The support is a polyurethane foam layer, in which a filler is mixed. The filler is a mixed material of quartz sand and environmentally friendly particles in a ratio of 2:5. The environmentally friendly particles are prepared by mixing thermoplastic polyurethane elastomer, UV-resistant additive, kaolin, and titanium dioxide through melt blending equipment to obtain thermoplastic elastomer particles. The base fabric is a polypropylene fiber cloth.

[0033] In addition, this embodiment also provides a method for preparing an ultra-low curvature artificial turf, such as Figure 1 As shown, the method adopts the above-mentioned materials for preparation, comprising the following steps:

[0034] S1. Preparation of curved grass silk materials: according to the formula of curved grass silk, weigh polypropylene, linear low-density polyethylene, masterbatch, anti-aging additives, and processing aids by weight;

[0035] S2, production of curved grass yarn, adding polypropylene, linear low-density polyethylene, masterbatch, anti-aging additives, and processing aids into a screw machine respectively, and performing blending, melt extrusion, traction, drawing, shaping, and winding in sequence, and finally obtaining curved grass yarn;

[0036] S3, straight grass yarn material preparation, according to the formula of straight grass yarn, weigh linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging additives, and processing aids by mass;

[0037] S4, making curved straight grass yarn, respectively adding them into a screw machine for blending, melt extrusion, pulling, drawing, and shaping in sequence, and then wrapping the prepared curved grass yarn around the straight grass yarn and winding it to obtain the curved straight grass yarn;

[0038] S5. Production of ultra-low curvature artificial turf: tufting the curved straight grass yarn onto the base fabric through the yarn tube feeding method, and evenly applying glue on the back of the base fabric and drying it. Finally, the base fabric and the support are combined to form an ultra-low curvature artificial turf;

[0039] In addition, after the ultra-low curvature artificial turf is made, it is necessary to perform density testing on the turf, specifically:

[0040] Use an artificial turf densitometer to randomly select several test points from each square meter of turf, including at least 3 test points in the area 10 cm away from the edge of the ultra-low curvature artificial turf, and at least 3 test points in the center of the low curvature artificial turf at 80 cm × 80 cm;

[0041] The number of grass strands at each test point was recorded, and weighted calculation was performed based on the test points in different areas to obtain the density of the ultra-low curvature artificial turf. The calculation formula is:

[0042]

[0043] Where P 草坪 is the density of ultra-low curvature artificial turf, P 边缘 is the density of the ultra-low curvature artificial turf 10 cm away from the edge, m is the number of samples in the ultra-low curvature artificial turf 10 cm away from the edge, P 中心 is the density at 80cm×80cm in the center of the low-curvature artificial turf, and n is the number of samples at 80cm×80cm in the center of the low-curvature artificial turf.

[0044] Based on the above, the present invention is further described using specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment;

[0045] Example 1

[0046] The curved grass yarn is made of the following ingredients in parts by weight: 85 parts of homopolymer polypropylene, 15 parts of linear low-density polyethylene, 4 parts of masterbatch, 4 parts of anti-aging additives, and 3 parts of processing aids.

[0047] The straight grass yarn is made of the following ingredients in parts by weight: 90 parts of linear low-density polyethylene, 10 parts of linear high-density polyethylene, 5 parts of masterbatch, 5 parts of anti-aging additives, and 2 parts of processing aids.

[0048] In this embodiment, a method for preparing an ultra-low curvature artificial turf is specifically as follows: weighed homopolymer polypropylene, linear low-density polyethylene, masterbatch, anti-aging additive, and processing aid are respectively added into a screw machine for blending, melt extrusion, traction, drawing, shaping, and winding in sequence to finally obtain curved grass yarn.

[0049] Then the weighed linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging additive and processing aid are respectively added into a screw machine for blending, melt extrusion, traction, drawing, shaping and winding the prepared curved yarn around the straight yarn to finally obtain the curved wrapped straight grass yarn.

[0050] Then the straight grass yarns are tufted onto the PP base fabric through a yarn tube. The adhesive used is styrene-butadiene latex, and the inorganic filler is light calcium carbonate. The prepared glue is evenly applied to the back of the base fabric with tufted artificial grass yarns. After drying, drying and punching, an ultra-low curvature artificial turf can be obtained.

[0051] Example 2

[0052] The curved grass yarn is made of the following ingredients in parts by weight: 90 parts of homopolymer polypropylene, 10 parts of linear low-density polyethylene, 5 parts of masterbatch, 4 parts of anti-aging additives, and 2 parts of processing aids.

[0053] The straight grass yarn is made of the following ingredients in parts by weight: 85 parts of linear low-density polyethylene, 15 parts of linear high-density polyethylene, 4 parts of masterbatch, 4 parts of anti-aging additives, and 3 parts of processing aids.

[0054] In this embodiment, a method for preparing an ultra-low curvature artificial turf is specifically as follows: weighed homopolymer polypropylene, linear low-density polyethylene, masterbatch, anti-aging additive, and processing aid are respectively added into a screw machine for blending, melt extrusion, traction, drawing, shaping, and winding in sequence to finally obtain curved grass yarn.

[0055] Then the weighed linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging additive and processing aid are respectively added into a screw machine for blending, melt extrusion, traction, drawing, shaping and winding the prepared curved yarn around the straight yarn to finally obtain the curved wrapped straight grass yarn.

[0056] Then the straight grass yarns are tufted onto the PP base fabric through a yarn tube. The adhesive used is styrene-butadiene latex, and the inorganic filler is light calcium carbonate. The prepared glue is evenly applied to the back of the base fabric with tufted artificial grass yarns. After drying, drying and punching, an ultra-low curvature artificial turf can be obtained.

[0057] Example 3

[0058] The curved grass yarn is made of the following ingredients in parts by weight: 95 parts of homopolymer polypropylene, 5 parts of linear low-density polyethylene, 3 parts of masterbatch, 6 parts of anti-aging additives, and 5 parts of processing aids.

[0059] The straight grass yarn is made of the following ingredients in parts by weight: 80 parts of linear low-density polyethylene, 20 parts of linear high-density polyethylene, 4 parts of masterbatch, 8 parts of anti-aging additives, and 4 parts of processing aids.

[0060] In this embodiment, a method for preparing an ultra-low curvature artificial turf is specifically as follows: weighed homopolymer polypropylene, linear low-density polyethylene, masterbatch, anti-aging additive, and processing aid are respectively added into a screw machine for blending, melt extrusion, traction, drawing, shaping, and winding in sequence to finally obtain curved grass yarn.

[0061] Then the weighed linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging additive and processing aid are respectively added into a screw machine for blending, melt extrusion, traction, drawing, shaping and winding the prepared curved yarn around the straight yarn to finally obtain the curved wrapped straight grass yarn.

[0062] Then the straight grass yarns are tufted onto the PP base fabric through a yarn tube. The adhesive used is styrene-butadiene latex, and the inorganic filler is light calcium carbonate. The prepared glue is evenly applied to the back of the base fabric with tufted artificial grass yarns. After drying, drying and punching, an ultra-low curvature artificial turf can be obtained.

[0063] Comparative Example 1

[0064] The curved grass yarn is made of the following ingredients in parts by weight: 85 parts of homopolymer polypropylene, 15 parts of linear low-density polyethylene, 4 parts of masterbatch, 4 parts of anti-aging additives, and 3 parts of processing aids.

[0065] The straight grass yarn is made of the following ingredients in parts by weight: 90 parts of linear low-density polyethylene, 10 parts of linear high-density polyethylene, 5 parts of masterbatch, 5 parts of anti-aging additives, and 2 parts of processing aids.

[0066] Comparative Example 2

[0067] The curved grass yarn is made of the following ingredients in parts by weight: 90 parts of homopolymer polypropylene, 10 parts of linear low-density polyethylene, 5 parts of masterbatch, 4 parts of anti-aging additives, and 2 parts of processing aids.

[0068] The straight grass yarn is made of the following ingredients in parts by weight: 85 parts of linear low-density polyethylene, 15 parts of linear high-density polyethylene, 4 parts of masterbatch, 4 parts of anti-aging additives, and 3 parts of processing aids.

[0069] The preparation method of artificial turf in Comparative Example 1 and Comparative Example 2 is as follows: weighed homopolymer polypropylene, linear low-density polyethylene, masterbatch, anti-aging aid, and processing aid are added to a screw machine respectively for blending, melt extrusion, traction, drawing, shaping, and winding, and finally twisting to obtain curved grass yarn. Then weighed linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging aid, and processing aid are added to a screw machine respectively for blending, melt extrusion, traction, drawing, shaping, and winding, and finally twisting to obtain straight grass yarn.

[0070] Then the curved yarn and straight yarn are fed into two yarn tubes respectively to tuft the straight yarn and the curved yarn onto the PP base fabric; the adhesive used is styrene-butadiene latex, and the inorganic filler is light calcium carbonate. The prepared glue is evenly applied on the back of the base fabric with tufted artificial grass yarn. After drying, drying and punching, conventional artificial turf can be obtained.

[0071] The curvature of the artificial turfs prepared in Examples 1-3 and Comparative Examples 1-2 was measured at two points on the left, middle and right sides, and the test results were as follows:

[0072] Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Curvature % (left side) 93 93 94 58 60 Curvature % (left side) 92 94 94 60 61 Curvature % (middle) 91 93 95 57 59 Curvature % (middle) 92 94 93 59 60 Curvature % (right side) 94 93 93 61 62 Curvature % (right side) 93 93 94 60 62 Curvature % (average) 92.5 93.3 93.8 59.2 60.7 Curvature grading Ultra low curvature Ultra low curvature Ultra low curvature Standard curvature Standard curvature

[0073] In summary, compared with the prior art, the present invention wraps the curved yarn around the straight yarn during the process of producing the straight yarn drawing and winding, and then tufts the straight yarn and the curved yarn onto the base fabric through a yarn tube. Since the straight yarn and the curved yarn are not subjected to spiral deformation, the wear of the equipment on the grass yarn during the twisting process is reduced, so that the cut of the produced artificial turf is smoother, smoother to the touch, and has a good touch.

[0074] In addition, artificial turf with ultra-low curvature has better support than artificial turf with standard curvature, is non-directional when stepped on, has a fluffy grass surface and good resilience, and is closer to the effect of natural grass. It also reduces the production process and improves production efficiency.

[0075] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An ultra-low curvature artificial turf, characterized in that: The ultra-low curvature artificial turf is made of artificial grass yarn, base fabric, glue and a support, the artificial grass yarn is tufted on the base fabric, the glue is coated on the back of the base fabric, one end of the artificial grass yarn passes through the base fabric and is fixed by the glue coated on the back of the base fabric; The artificial grass yarn is made by wrapping straight yarn and curved yarn, the curved yarn is wrapped on the straight yarn, and the straight yarn and the curved yarn are tufted onto the base cloth by a yarn tube feeding method.

2. The ultra-low curvature artificial turf according to claim 1, characterized in that: The straight grass yarn component is made of 80-90 parts of linear low-density polyethylene, 10-20 parts of linear high-density polyethylene, 3-8 parts of masterbatch, 2-5 parts of anti-aging additives, and 1-3 parts of processing aids in parts by mass.

3. The ultra-low curvature artificial turf according to claim 2, characterized in that: The curved grass silk component is made of 85-95 parts of homopolymer polypropylene, 5-15 parts of linear low-density polyethylene, 4-7 parts of masterbatch, 2-5 parts of anti-aging aid, and 1-3 parts of processing aid in parts by mass. The processing aid is composed of zinc silicate, environmentally friendly plasticizer, softener, talcum powder, reinforcing agent, light stabilizer, metal ion passivator, dispersant, light shielding agent and sustained release agent.

4. The ultra-low curvature artificial turf according to claim 3, characterized in that: The glue component is prepared by uniformly mixing 50-70 parts of styrene-butadiene latex, 2-5 parts of inorganic filler and a proper amount of deionized water by weight. The inorganic filler is composed of one or more of light calcium carbonate, heavy calcium carbonate powder and barium sulfate.

5. The ultra-low curvature artificial turf according to claim 4, characterized in that: The support is a polyurethane foam layer, and a filler is mixed in the polyurethane foam layer. The filler is a mixed material of quartz sand and environmentally friendly particles in a ratio of 2:

5. The environmentally friendly particles are prepared by mixing thermoplastic polyurethane elastomer, UV-resistant additive, kaolin, and titanium dioxide, and then processed by melt blending equipment to obtain thermoplastic elastomer particles. The base fabric is a polypropylene fiber cloth.

6. A method for preparing an ultra-low curvature artificial turf, characterized in that: The method is prepared by using the materials described in claims 1-5, and comprises the following steps: S1. Preparation of curved grass silk materials: according to the formula of curved grass silk, weigh polypropylene, linear low-density polyethylene, masterbatch, anti-aging additives, and processing aids by mass; S2, production of curved grass yarn, adding polypropylene, linear low-density polyethylene, masterbatch, anti-aging additives, and processing aids into a screw machine respectively, and performing blending, melt extrusion, traction, drawing, shaping, and winding in sequence, and finally obtaining curved grass yarn; S3, straight grass yarn material preparation, according to the formula of straight grass yarn, weigh linear low-density polyethylene, linear high-density polyethylene, masterbatch, anti-aging additives, and processing aids by mass; S4, making curved straight grass yarn, respectively adding them into a screw machine for blending, melt extrusion, pulling, drawing, and shaping in sequence, and then wrapping the prepared curved grass yarn around the straight grass yarn and winding it to obtain the curved straight grass yarn; S5. Production of ultra-low curvature artificial turf: tuft the curved straight grass fibers onto the base fabric through the yarn tube feeding method, and evenly apply glue on the back of the base fabric and dry it. Finally, the base fabric is combined with a support to form an ultra-low curvature artificial turf.

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