Artificial turf and method for manufacturing the same

Abstract

The application provides an artificial turf and a preparation method thereof, which comprises a substrate layer and artificial grass filaments tufted on the substrate layer, wherein elastic liquid-filled air bags are arranged in elastic adjusting channels, and the elasticity of the substrate layer is adjusted by the synchronous contraction or expansion movement of the elastic liquid-filled air bags; the elastic liquid-filled air bags drive the substrate layer to vibrate synchronously by vibration. The elasticity of the artificial turf is adjusted by adjusting the expansion degree of the elastic liquid-filled air bags, so that the elasticity of the artificial turf can be adjusted according to different scenes, different sports and different user needs. The elastic liquid-filled air bags can also transmit vibration from the vibration to the substrate layer. When rainwater is stored in the substrate layer, the vibration can accelerate the rainwater to fall off, thereby improving the drainage function of the artificial turf in an active manner.

Description

Technical Field

[0001] This invention relates to the field of artificial turf technology, specifically to an artificial turf and its preparation method. Background Technology

[0002] The prior art, disclosed in CN209368626U, describes a high-elasticity artificial turf with drainage function and a drainage turf facility. The artificial turf comprises artificial grass fibers, a 3D warp-knitted elastic spacer fabric layer, and a base fabric layer; or artificial grass fibers, a base fabric layer, an adhesive layer, and a 3D warp-knitted elastic spacer fabric layer; or artificial grass fibers, a 3D warp-knitted elastic spacer fabric layer, and an adhesive layer. The 3D warp-knitted elastic spacer fabric layer has excellent drainage performance, thereby solving the problem of poor water permeability and easy water accumulation in existing artificial turf, and enabling rapid drainage.

[0003] The elasticity and drainage efficiency of artificial turf have a significant impact on different types of sports activities, as they provide appropriate ground cushioning and rebound, affecting athlete comfort, injury prevention, and athletic performance. However, the aforementioned high-elasticity artificial turf with drainage function still has some obvious shortcomings in use: the high-elasticity turf of the device cannot adjust the turf elasticity according to usage needs, and the drainage function is relatively passive. Due to the dense weave structure of the 3D warp-knitted layer, the gaps in it actually provide good storage space for rainwater. Therefore, the drainage performance of the aforementioned turf needs further verification. Summary of the Invention

[0004] The purpose of this invention is to provide an artificial turf and its preparation method to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] An artificial turf includes a substrate layer and artificial grass fibers tufted on the substrate layer. The substrate layer has a plurality of parallel elastic adjustment channels evenly spaced within it. Elastic liquid-filled airbags are interspersed within the elastic adjustment channels. The elastic liquid-filled airbags adjust the elasticity of the substrate layer through synchronous contraction or expansion. The elastic liquid-filled airbags vibrate to cause the substrate layer to oscillate synchronously. The substrate layer includes 1-2 layers of 3D warp-knitted elastic spacer fabric, and the elastic adjustment channels are disposed within the 3D warp-knitted elastic spacer fabric layers.

[0007] Preferably, the substrate layer further includes a face layer and a back fabric layer, and the 3D warp-knitted elastic spacer fabric layer is disposed between the face layer and the back fabric layer. The connection method between the 3D warp-knitted elastic spacer fabric layer and the face layer and the back fabric layer includes, but is not limited to, knitting molding, bonding molding and thermoforming.

[0008] Preferably, the 3D warp-knitted elastic spacer fabric layer is a single-layer structure, and the artificial grass tufted fibers are connected to the surface layer.

[0009] Preferably, the 3D warp-knitted elastic spacer fabric layer has a double-layer structure, and a spacer layer is provided between the two layers of the 3D warp-knitted elastic spacer fabric layer. The artificial grass fibers pass through the upper 3D warp-knitted elastic spacer fabric layer and are tufted and connected to the spacer layer.

[0010] Preferably, the elastic adjustment channel is formed during the weaving process of the 3D warp-knitted elastic spacer fabric layer, and the cross-section of the elastic adjustment channel includes, but is not limited to, polygonal, circular or irregular structures, and the cross-section of the elastic liquid-filled airbag is consistent with the cross-sectional shape of the elastic adjustment channel.

[0011] Preferably, several of the elastic liquid-filled airbags are connected to an external liquid pump device via pipes. A pressure sensor is also installed in the pipe where the elastic liquid-filled airbags are located. The pressure sensor is used to monitor the pressure inside the elastic liquid-filled airbags, thereby maintaining the pressure inside the elastic liquid-filled airbags within a preset range. The external liquid pump device pumps liquid into or out of the elastic liquid-filled airbags to adjust the elasticity of the substrate layer.

[0012] Preferably, an ultrasonic vibration device is also provided inside the pipe where several of the elastic liquid-filled airbags are located. The ultrasonic vibration device generates vibration to drive the elastic liquid-filled airbags to vibrate, thereby synchronously driving the substrate layer to vibrate. The vibration generated by the substrate layer causes the water droplets filled in the gaps inside the substrate layer to fall off.

[0013] Preferably, the thickness of the 3D warp-knitted elastic spacer fabric layer is 10-30 mm.

[0014] A preparation method for preparing the artificial turf, comprising the following steps:

[0015] Step 1: The face layer, base layer and 3D warp-knitted elastic spacer fabric layer are woven into shape using a warp knitting machine. During the weaving process, the 3D warp-knitted elastic spacer fabric layer has elasticity adjustment channels.

[0016] Step 2: Depending on the composite requirements of single or double layers of 3D warp-knitted elastic spacer fabric, artificial grass fibers are tufted onto the surface layer or spacer layer. After tufting, the surface layer and the base fabric layer are composited by weaving, bonding, or thermoforming to form a semi-finished artificial turf.

[0017] Step 3: Several elastic liquid-filled airbags are inserted into the elasticity adjustment channel by passing a guide wire through the elasticity adjustment channel to form the finished artificial turf. Subsequently, by connecting these elastic liquid-filled airbags to an external liquid pump or vibration mechanism, the artificial turf will have elasticity adjustment and vibration functions.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] This invention creates elasticity adjustment channels within a 3D warp-knitted elastic spacer fabric layer. Elastic liquid-filled airbags are interspersed within these channels. By adjusting the expansion of these airbags, the elasticity of the artificial turf can be adjusted. This allows the turf to be tailored to different scenarios, sports, and user needs, improving the user experience. Furthermore, the elastic liquid-filled airbags can transmit vibrations to the substrate layer. When rainwater accumulates in the substrate layer, the vibrations accelerate water loss, thus actively improving the drainage function of the artificial turf. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the double-layer 3D warp-knitted elastic spacer fabric layer structure of the present invention;

[0021] Figure 2 This is a schematic diagram of the single-layer 3D warp-knitted elastic spacer fabric layer structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the circular cross-section elastic adjustment channel and the elastic liquid-filled airbag structure that cooperates with it according to the present invention;

[0023] Figure 4 This is a schematic diagram of the polygonal cross-section elastic adjustment channel and the elastic liquid-filled airbag structure that cooperates with it according to the present invention;

[0024] Figure 5 This is a schematic diagram of the connection structure of the external liquid pump device of the present invention;

[0025] Figure 6 This is a schematic diagram of the connection structure of the ultrasonic oscillation device of the present invention.

[0026] In the diagram: 1. Substrate layer, 2. Artificial grass fibers, 3. Elasticity adjustment channel, 4. Elastic liquid-filled airbag, 5. 3D warp-knitted elastic spacer fabric layer, 6. Surface layer, 7. Base fabric layer, 8. Spacer layer, 9. Pipe, 10. External liquid pump device, 11. Pressure sensor, 12. Ultrasonic oscillation device. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1-6 The present invention provides a technical solution:

[0029] Example 1:

[0030] An artificial turf includes a substrate layer 1 and artificial grass fibers 2 tufted on the substrate layer 1. The substrate layer 1 has a plurality of parallel elastic adjustment channels 3 evenly spaced within it. Elastic liquid-filled airbags 4 are interspersed within the elastic adjustment channels 3. The elastic liquid-filled airbags 4 adjust the elasticity of the substrate layer 1 through synchronous contraction or expansion. The elastic liquid-filled airbags 4 cause the substrate layer 1 to vibrate synchronously through vibration. The substrate layer 1 includes 1-2 layers of 3D warp-knitted elastic spacer fabric 5. The elastic adjustment channels 3 are disposed within the 3D warp-knitted elastic spacer fabric 5.

[0031] In this embodiment, the substrate layer 1 includes a single layer of 3D warp-knitted elastic spacer fabric 5. The thickness of the 3D warp-knitted elastic spacer fabric 5 is 10-30mm, which can be adjusted according to site requirements. Since the elasticity adjustment channel 3 is located within the 3D warp-knitted elastic spacer fabric 5, in this layered structure, the artificial grass fibers 2 tufted are positioned on the surface layer 6 above the 3D warp-knitted elastic spacer fabric 5, as shown in the attached specification. Figure 2 The surface layer 6 and the bottom layer 7 are woven from polyester fiber, polypropylene fiber, polyethylene fiber, or polyamide fiber, and are further combined with a 3D warp-knitted elastic spacer fabric layer 5 using a weaving method, as shown in the attached instruction manual. Figure 2The elastic adjustment channel 3 has a hexagonal cross-section, and therefore the elastic liquid filling airbag 4 that cooperates with it also has a hexagonal cross-section. By installing the elastic liquid filling airbag 4 in the elastic adjustment channel 3, the elasticity of the substrate layer 1 becomes adjustable. By changing the expansion coefficient of the elastic liquid filling airbag 4, the elasticity of the substrate layer 1 can be changed. Several elastic liquid filling airbags 4 are connected to an external liquid pump device 10 via a pipe 9. In this embodiment, the external liquid pump device 10 is a CQ type magnetic drive circulation pump manufactured by Shanghai Sunshine Pump Industry Manufacturing Co., Ltd., as the liquid pumping in or out device. The CQ type magnetic drive circulation pump manufactured by this company has various specifications to meet the needs of artificial turf of different areas. This magnetic drive circulation pump enables the liquid to be transported back and forth between the elastic liquid filling airbag 4 and the storage tank, and by setting on the pipe 9 Pressure sensor 11 monitors the pressure inside the elastic liquid-filled airbag 4. When the pressure reaches a preset value, the solenoid valve in the drive pipe 9 is closed to maintain the pressure inside the elastic liquid-filled airbag 4. When pressure adjustment is required, the solenoid valve is opened to drive the external liquid pump device 10 to move, thereby increasing or decreasing the pressure inside the elastic liquid-filled airbag 4, thus adjusting the elasticity of the artificial turf. Furthermore, since traditional artificial turf has a high weave density, although the material itself does not absorb water, its dense gaps provide storage space for rainwater. Therefore, by connecting several elastic liquid-filled airbags 4 to the ultrasonic vibration device 12, the vibrator of the ultrasonic vibration device 12 transmits the vibration to the substrate layer 1, thereby causing the rainwater stored in the gaps of the substrate layer 1 to fall, thus further improving the drainage effect of the artificial turf and ensuring normal use by people on it.

[0032] Example 2:

[0033] In this embodiment, the substrate layer 1 includes two layers of double-layered 3D warp-knitted elastic spacer fabric 5, which are connected by a spacer layer 8. An elasticity adjustment channel 3 is disposed within the lower 3D warp-knitted elastic spacer fabric layer 5. (Refer to the appendix of the specification.) Figure 1 In this layered structure, the artificial grass fibers 2 penetrate the upper 3D warp-knitted elastic spacer fabric layer 5 and are tufted onto the spacer layer 8. This tufting method makes the connection of the artificial grass fibers 2 tighter. Furthermore, the elastic adjustment channel 3 has a rectangular cross-section, as shown in the attached instruction manual. Figure 4 In this structure, the elastic liquid-filled airbag 4 is set as a rectangular structure. The cross-section of the rectangular structure has a large flatness. By uniformly setting the elastic liquid-filled airbag 4 of this structure, the elasticity of the substrate layer 1 can be adjusted more evenly. At the same time, the elastic liquid-filled airbag 4 is also connected to the external liquid pump device 10 and the ultrasonic vibration device 12.

[0034] A preparation method for preparing the above-mentioned artificial turf includes the following steps:

[0035] Step 1: The face layer 6, the base layer 7 and the 3D warp-knitted elastic spacer fabric layer 5 are woven into shape by a warp knitting machine. During the weaving process, the 3D warp-knitted elastic spacer fabric layer 5 has elasticity adjustment channels 3.

[0036] Step 2: Depending on the single or double layer composite requirements of the 3D warp-knitted elastic spacer fabric layer 5, tuft the artificial grass fibers 2 onto the surface layer 6 or spacer layer 8. After tufting, the surface layer 6 and the base fabric layer 7 are composited by weaving, bonding or thermoforming to form a semi-finished artificial turf.

[0037] Step 3: Several elastic liquid-filled airbags 4 are inserted into the elasticity adjustment channel 3 by passing the guide wire through the elasticity adjustment channel 3 to form the finished artificial turf. Subsequently, by connecting the several elastic liquid-filled airbags 4 to an external liquid pump or vibration mechanism, the artificial turf can have elasticity adjustment and vibration functions.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An artificial turf comprising a substrate layer and artificial grass filaments tufted onto the substrate layer, characterized in that: The base material layer is uniformly provided with a plurality of elastic adjustment channels arranged in parallel, and the elastic adjustment channels are provided with elastic liquid-filled air bags. The plurality of elastic liquid-filled air bags are connected with an external liquid pump device through pipelines, and a pressure sensor is further arranged on the pipeline to monitor the pressure in the plurality of elastic liquid-filled air bags, so that the pressure in the elastic liquid-filled air bags is maintained within a preset range, and the liquid in the elastic liquid-filled air bags is pumped in or out by the external liquid pump device to adjust the elasticity of the base material layer. The pipeline in which the plurality of elastic liquid-filled air bags are arranged is further provided with an ultrasonic oscillation device.

2. Artificial turf according to claim 1, characterized in that: The base material layer further comprises a surface layer and a base cloth layer, and the 3D warp-knitted elastic spacer fabric layer is arranged between the surface layer and the base cloth layer.

3. Artificial turf according to claim 2, characterized in that: The 3D warp-knitted elastic spacer fabric layer is a single-layer structure, and the artificial grass filaments are tufted on the surface layer.

4. The artificial turf according to claim 2, wherein: The 3D warp-knitted elastic spacer fabric layer is a double-layer structure, and a spacing layer is further arranged between the double-layer 3D warp-knitted elastic spacer fabric layers.

5. An artificial turf according to claim 3 or 4, c h a r a c t e r i s e d in that: The elastic adjustment channels are formed during the knitting of the 3D warp-knitted elastic spacer fabric layer, and the cross section of the elastic adjustment channels comprises a polygonal or circular structure.

6. An artificial turf according to claim 5, characterized in that: The thickness of the 3D warp-knitted elastic spacer fabric layer is 10-30 mm.

7. A production process for producing the artificial turf according to any one of claims 1 to 6, characterized in that, The method comprises the following steps: Step one: knitting the surface layer, the base cloth layer and the 3D warp-knitted elastic spacer fabric layer by a warp knitting machine, so that the 3D warp-knitted elastic spacer fabric layer has elastic adjustment channels during the knitting process; Step two: according to the composite requirements of the 3D warp-knitted elastic spacer fabric layer, the artificial grass filaments are tufted on the surface layer or the spacing layer, and after the tufting is completed, the surface layer and the base cloth layer are compounded by knitting, bonding or thermal compounding to form a semi-finished product of artificial turf; Step three: a plurality of elastic liquid-filled air bags are arranged in the elastic adjustment channels by guiding the filaments through the elastic adjustment channels to form a finished product of artificial turf, and subsequently the plurality of elastic liquid-filled air bags are connected to an external liquid pump or an oscillation mechanism to enable the artificial turf to have the functions of elastic adjustment and oscillation.

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