Artificial grass suitable for camouflage as well as preparation method and application of artificial grass

Abstract

The invention relates to the technical field of engineering camouflage, in particular to artificial grass suitable for camouflage and a preparation method and application thereof.The artificial grass comprises a back layer and artificial grass monofilaments, the back layer comprises a first adhesive layer, a reinforcing layer and a second adhesive layer which are sequentially stacked from bottom to top, and the artificial grass monofilaments are connected to the surface of the first adhesive layer; the artificial grass monofilaments are prepared from bionic vegetation through melt spinning; the reinforcing layer comprises multiple layers of fabric cores, a core layer sizing material is arranged between any two adjacent layers of fabric cores, and the fabric cores are connected through the core layer sizing material. The artificial grass disclosed by the invention can realize optical, radar and infrared camouflage, and meanwhile, can meet the mechanical property requirements of quickly paving and collecting and moving paving materials; and when the method is applied to the camouflage field, the appearance contour of the position can be camouflaged well, and the exposure risk is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering camouflage, and particularly relates to an artificial grass suitable for camouflage, a preparation method thereof, and an application thereof. Background Art

[0002] Artificial grass has a decorative function and is widely used in fields such as sports, leisure, and camouflage. For example, when applied to the camouflage field, it can camouflage important objects or places. With the increasingly wide application of artificial grass, higher requirements are correspondingly put forward for the performance of artificial grass.

[0003] Currently, in the camouflage field, lightweight coils for camouflage have been disclosed. This lightweight coil can be quickly erected or removed and is suitable for the camouflage of large-size near-plane projects such as important positions. However, the current lightweight coil only has a high degree of matching and fusion with the background in terms of color and does not consider compatibility in the visible light, infrared, or radar bands. If a camouflage coating is applied to the lightweight coil to achieve compatibility in the visible light, infrared, or radar bands, the development technology of the camouflage coating is difficult. Therefore, it is necessary to propose an artificial grass that realizes optical, radar, and infrared camouflage imitating plants.

[0004] In view of this, the inventor of the present invention provides an artificial grass suitable for camouflage, a preparation method thereof, and an application thereof to solve the above technical problems. Summary of the Invention

[0005] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and propose an artificial grass suitable for camouflage, a preparation method thereof, and an application thereof. This artificial grass considers compatibility in the visible light, infrared, or radar bands and solves the problem that the development technology of the camouflage coating is difficult when a camouflage coating is applied to the lightweight coil in the prior art.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] On the one hand, the present invention provides an artificial grass suitable for camouflage, including a back layer and artificial grass filaments. The back layer includes a first glue layer, a reinforcing layer, and a second glue layer that are sequentially stacked from bottom to top, and the artificial grass filaments are connected to the surface of the first glue layer;

[0008] The artificial grass filaments are prepared by melt spinning of bionic vegetation;

[0009] The reinforcing layer includes multiple fabric cores, and a core layer glue is provided between any two adjacent fabric cores and they are connected through the core layer glue.

[0010] It should be noted that the fabric core serves as a reinforcing skeleton, and the core layer rubber compound serves as a polymer elastomer. The performance of the reinforcing layer will directly affect the performance of the back layer. Specifically, a large part of the mechanical properties of the back layer depends on the fabric core inside the reinforcing layer, and a large part of the weather resistance of the back layer depends on the core layer rubber compound inside the reinforcing layer. Therefore, there are clear requirements for the selection of the core layer rubber compound and the fabric core.

[0011] Furthermore, both the first rubber layer and the second rubber layer are chlorosulfonated polyethylene rubber.

[0012] Specifically, the chlorosulfonated polyethylene rubber has good physical and mechanical properties, wear resistance, aging resistance, heat resistance and low temperature resistance. Therefore, it can indirectly endow the back layer with characteristics such as chemical corrosion resistance, wear resistance and high temperature resistance.

[0013] Furthermore, the bionic vegetation is prepared from a plant-like slurry through a solution casting process;

[0014] The plant-like slurry comprises the following components in parts by weight: 50-120 parts of chlorophyll derivative, 30-60 parts of polyvinyl alcohol, 0.01-10 parts of moisture absorbent, 0.1-20 parts of electromagnetic scattering regulator and 0.01-5 parts of defoamer.

[0015] It should be noted that since chlorophyll in plants is active and will decompose under the action of light when separated from plants, chlorophyll extracted from plants cannot be used for bionic camouflage. Therefore, the focus of bionic camouflage lies in chlorophyll derivatives with the same spectral characteristics as plant chlorophyll. In the present invention, the structural formula of the chlorophyll derivative is as follows:

[0016]

[0017] Furthermore, the moisture absorbent is a metal chloride, and the metal chloride is selected from calcium chloride or lithium chloride; the moisture absorbent can control the humidity of the plant-like slurry, thereby reducing the water activity of the artificial grass monofilament, achieving the purpose of regulating the water permeability and air permeability of the artificial grass monofilament, making the artificial grass monofilament have similar water permeability to plants, and achieving the purpose of being consistent with the thermal characteristics of the background vegetation.

[0018] The electromagnetic scattering regulator is at least one of carbon black, graphite, carbon nanotubes, carbonyl iron powder and carbonyl nickel powder; the electromagnetic scattering regulator can control the electromagnetic parameters of the plant-like slurry, so that the artificial grass monofilament has the same spectral reflection characteristics as plants, achieving the same spectrum as the background vegetation.

[0019] The defoamer is at least one of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alkanolamide ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether, and polydimethylsiloxane; the defoamer can reduce the surface tension of the artificial plant slurry, thereby inhibiting the generation of bubbles in the artificial plant slurry and accelerating the elimination of the generated bubbles, so that the porosity of the bionic vegetation formed after solution casting is relatively low, making the artificial grass monofilament have similar air permeability to plants.

[0020] Further, the fabric core is any one of polyester cloth, nylon cloth, acrylic cloth, fiberglass cloth, polytetrafluoroethylene fiber cloth, aramid fiber cloth, and carbon fiber cloth. Specifically, the fabric core plays a role in bearing pressure and maintaining shape, and the structure and performance of the fabric core determine the stress resistance and strain resistance of the artificial grass.

[0021] Further, the core layer rubber compound is any one of polyurethane rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, ethylene propylene diene monomer rubber, and fluororubber. The core layer rubber compound first plays a role in bonding multiple fabric cores, secondly helps the fabric cores maintain dimensional stability, and additionally enhances the flex resistance, high and low temperature resistance, and all-weather aging resistance of the back layer.

[0022] On the other hand, the present invention provides a method for preparing artificial grass suitable for camouflage. Based on the above-mentioned artificial grass, it includes the following steps:

[0023] Step 1, prepare chlorophyll derivatives: Weigh copper acetate and chlorophyll in proportion, then dissolve the chlorophyll in ethanol to obtain a chlorophyll solution, dissolve the copper acetate in ethanol to obtain an aqueous copper acetate solution, and finally mix the chlorophyll solution and the aqueous copper acetate solution, and prepare chlorophyll derivatives by an ion exchange process;

[0024] Step 2, prepare artificial grass monofilaments: Weigh chlorophyll derivatives, polyvinyl alcohol, a moisture absorbent, an electromagnetic scattering regulator, and a defoamer in proportion, and mix them evenly to obtain an artificial plant slurry. Then, the artificial plant slurry is made into bionic vegetation through a solution casting process, and finally the bionic vegetation is made into artificial grass monofilaments through melt spinning;

[0025] Step 3, prepare artificial grass: Lay the first glue layer, the reinforcement layer, and the second glue layer on the lower mold of the forming mold from bottom to top in sequence, close the upper mold and the lower mold of the forming mold, and make the first glue layer, the reinforcement layer, and the second glue layer into an integral body through hot pressing. After the hot pressing is completed, cool and release the pressure to obtain the back layer. Finally, bond the artificial grass monofilaments to the surface of the first glue layer with an adhesive to obtain the target artificial grass.

[0026] Further, in Step 1, the molar ratio of copper acetate to chlorophyll is 1:1;

[0027] The volume ratio of the chlorophyll to ethanol is 1:5 to 10;

[0028] The volume ratio of the copper acetate to ethanol is 1:5 to 10;

[0029] The volume ratio of the chlorophyll solution to the copper acetate aqueous solution is 1:1 to 1.5;

[0030] During the ion replacement process, the replacement temperature is set at 100°C to 135°C, and the replacement reaction time is 20 min to 50 min.

[0031] Further, in step 2, there are 50 - 120 parts of the chlorophyll derivative, 30 - 60 parts of polyvinyl alcohol, 0.01 - 10 parts of the moisture absorbent, 0.1 - 20 parts of the electromagnetic scattering regulator, and 0.01 - 5 parts of the defoamer.

[0032] Further, in step 2, the process of forming the bionic vegetation from the bionic plant slurry through the solution casting process is as follows:

[0033] First, pour the bionic plant slurry into the casting tray, place the casting tray on the bracket, and adjust the bracket so that the casting tray is in a horizontal position; then start the heating device to heat the bionic plant slurry in the casting tray, so that the solvent of the bionic plant slurry gradually evaporates. As the solvent evaporates, the solute concentration of the bionic plant slurry gradually increases. After all the solvent of the bionic plant slurry has evaporated, solute crystallization is obtained and a solid film is formed; finally, turn off the heating device. After the solid film has completely cooled, peel it off from the casting tray to obtain the bionic vegetation;

[0034] Wherein the heating temperature is 60°C to 150°C.

[0035] Further, in step 2, during the mixing process, a homogenizing disperser is used for mixing and stirring, the stirring speed is set at 200 r / min to 500 r / min, and the stirring time is 30 min to 60 min;

[0036] Further, in step 2, the process of forming artificial grass monofilaments from the bionic vegetation through melt spinning is as follows:

[0037] Feed the bionic vegetation into the feed port of the melt spinning equipment, and melt - extrude through a twin - screw extruder to obtain primary monofilaments; subject the primary monofilaments to shaping by a hot plate and a hot plate to obtain artificial grass monofilaments;

[0038] Among them, the spinning temperature is 220°C to 260°C; the temperature of the hot plate is 50°C to 70°C, and the temperature of the hot plate is 110°C to 130°C.

[0039] Further, in step 3, during the hot pressing process, the pressing pressure is set to 0.5 MPa to 3.5 MPa, the pressing time is 30 min to 60 min, and the heating temperature is 100 °C to 180 °C.

[0040] Further, in step 3, the binder is polyurethane glue.

[0041] Further, in step 3, the reinforcing layer is prepared by a melt extrusion process, and the specific process is as follows:

[0042] First, the preheated core layer rubber material is added into the feed inlet of the extruder through a hopper. Then, the core layer rubber material is heated to a sufficient temperature and melted in the screw cavity of the extruder. Next, the melted core layer rubber material is quickly extruded and coated on the fabric core. Under the action of pressure, the melted core layer rubber material flows into the pores in the fabric core and cures on the surface of the fabric core, enabling the reinforcing layer to have good mechanical properties.

[0043] It should be noted that the traditional method for preparing the reinforcing layer is mainly to preform the core layer rubber material and then bond it to the fabric core through an adhesive for forming. However, this bonding method is prone to delamination, detachment, etc. due to insufficient bonding or adhesive failure.

[0044] On the other hand, the present invention provides an application of the artificial grass suitable for camouflage as described above in the field of camouflage.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] 1) The artificial grass suitable for camouflage provided by the present invention is provided with a back layer and artificial grass filaments bonded to its surface. The artificial grass filaments are prepared by melt spinning of bionic vegetation, and the bionic vegetation is prepared by a solution casting process from bionic plant slurry. Since the bionic plant slurry includes a chlorophyll derivative component, which is similar to the chlorophyll of the background vegetation and has good stability and will not decompose under the action of light, the artificial grass filaments can have similar spectral characteristics to the background vegetation for a long time, realizing bionic plant optical camouflage. Secondly, the bionic plant slurry also includes an electromagnetic scattering regulator component, which adjusts the dielectric constant on the surface of the artificial grass filaments. At the same time, a hygroscopic agent and an antifoaming agent component are also used to adjust the air permeability and water permeability on the surface of the artificial grass filaments, enabling the artificial grass filaments to have the same electromagnetic parameters, air permeability, and water permeability as the background vegetation, achieving the same spectrum as the background vegetation, and achieving the purpose of being consistent with the radar characteristics and thermal characteristics of the background vegetation, thereby realizing bionic plant radar and infrared camouflage.

[0047] 2) The artificial grass applicable to camouflage provided by the present invention is provided with a reinforcing layer. The reinforcing layer includes multiple fabric cores. Core layer rubber is provided between any two adjacent fabric cores and they are connected through the core layer rubber to form a structure arranged alternately in the order of fabric core - core layer rubber - fabric core. Among them, the fabric core serving as the framework adopts a fiber reinforcement body, and the fiber reinforcement body can play a good role in bearing pressure and maintaining shape, enabling the artificial grass to have certain anti-stress and anti-strain properties while having good flexibility, high mechanical strength, and ensuring that it does not break under a certain load, stress or certain deformation conditions. In addition, the core layer rubber adopts a polymer elastomer. This polymer elastomer has strong flexibility, especially it does not become brittle in a low-temperature environment, and can maintain flexibility, elasticity and elongation; and the polymer elastomer has good abrasion resistance, making it not easy to fall off when rubbing the surface of the artificial grass, and not easy to generate cracks and peeling under the actions of shearing, stretching, etc.; in addition, the polymer elastomer also has good aging resistance, making the artificial grass not easy to change in physical and chemical properties and mechanical properties when exposed to the atmosphere and sunlight for a long time, and having a long service life.

[0048] 3) The preparation method of the artificial grass applicable to camouflage provided by the present invention has a simple preparation process and uses fewer raw materials, which can improve the preparation efficiency and save costs. Moreover, the prepared artificial grass can achieve optical, radar and infrared camouflage, and at the same time can meet the mechanical property requirements of quickly laying and removing the paving material; in addition, the artificial grass can be better integrated with the surrounding background vegetation, so it can better camouflage the appearance contour of the position and avoid the exposure risk. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] The drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principles of the present invention.

[0050] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0051] Figure 1 It is a schematic structural diagram of the artificial grass applicable to camouflage of the present invention

[0052] Figure 2 It is a schematic structural diagram of a back layer provided by an embodiment of the present invention.

[0053] Among them: 1 is the back layer; 2 is the artificial grass monofilament; 11 is the first glue layer; 12 is the reinforcing layer; 13 is the second glue layer; 121 is the fabric core; 122 is the core layer rubber. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0054] Exemplary embodiments will be described in detail below. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. On the contrary, they are merely examples consistent with some aspects of the present invention as detailed in the appended claims.

[0055] Example 1

[0056] On the one hand, please refer to Figures 1 to 2 , this embodiment provides an artificial grass suitable for camouflage, including a back layer 1 and artificial grass filaments 2. The back layer 1 includes a first glue layer 11, a reinforcing layer 12, and a second glue layer 13 that are stacked in sequence from bottom to top. The artificial grass filaments 2 are bonded to the surface of the first glue layer 11;

[0057] The artificial grass filaments 2 are obtained by melt spinning of bionic vegetation;

[0058] As Figure 2 shown, the reinforcing layer 12 includes multiple fabric cores 121. A core layer adhesive 122 is provided between any two adjacent fabric cores 121 and they are connected through the core layer adhesive 122.

[0059] Specifically, the fabric core 121 is 5 layers.

[0060] In this embodiment, both the first glue layer 11 and the second glue layer 13 are chlorosulfonated polyethylene rubber.

[0061] Specifically, the fabric core 121 is made of polyester cloth; the core layer adhesive 122 is made of polyurethane rubber.

[0062] Furthermore, the bionic vegetation is obtained by solution casting of bionic plant slurry;

[0063] The bionic plant slurry includes the following components in parts by weight: 50 parts of chlorophyll derivative, 30 parts of polyvinyl alcohol, 0.01 part of calcium chloride, 0.1 part of carbon black, and 0.01 part of polyoxyethylene polyoxypropylene pentaerythritol ether.

[0064] In this embodiment, the structural formula of the chlorophyll derivative is as follows:

[0065]

[0066] On the other hand, this embodiment provides a method for preparing an artificial grass suitable for camouflage. Based on the artificial grass described in this embodiment, it includes the following steps:

[0067] Step 1: Prepare chlorophyll derivatives: Weigh copper acetate and chlorophyll in a molar ratio of 1:1. Then dissolve the chlorophyll in ethanol to obtain a chlorophyll solution, and dissolve the copper acetate in ethanol to obtain an aqueous copper acetate solution. Finally, mix the chlorophyll solution and the aqueous copper acetate solution, and use an ion exchange process to prepare chlorophyll derivatives;

[0068] Step 2: Prepare artificial grass monofilament 2: Weigh 50 parts of chlorophyll derivatives, 30 parts of polyvinyl alcohol, 0.01 part of calcium chloride, 0.1 part of carbon black, and 0.01 part of polyoxyethylene polyoxypropylene pentaerythritol ether, and mix them evenly to obtain a plant-like slurry. Then, use a solution casting process to form a bionic vegetation from the plant-like slurry, and finally, use a melt spinning process to make the bionic vegetation into artificial grass monofilament 2;

[0069] Step 3: Prepare artificial grass: Lay the first adhesive layer 11, the reinforcing layer 12, and the second adhesive layer 13 on the lower mold of the forming mold from bottom to top in sequence. Close the upper and lower molds of the forming mold, and heat and press to make the first adhesive layer 11, the reinforcing layer 12, and the second adhesive layer 13 into a whole. After the heating and pressing are completed, cool and depressurize to obtain the back layer 1. Finally, use polyurethane glue to bond the artificial grass monofilament 2 to the surface of the first adhesive layer 11 to obtain the target artificial grass.

[0070] Among them, in Step 1, the volume ratio of the chlorophyll to ethanol is 1:5;

[0071] The volume ratio of the copper acetate to ethanol is 1:5;

[0072] The volume ratio of the chlorophyll solution to the aqueous copper acetate solution is 1:1;

[0073] During the ion exchange process, set the exchange temperature to 100 °C and the exchange reaction time to 50 min.

[0074] In Step 2, during the mixing process, use a homogenizing disperser for mixing and stirring, set the stirring speed to 200 r / min, and the stirring time to 60 min;

[0075] In Step 2, the process of forming the bionic vegetation from the plant-like slurry by the solution casting process is as follows:

[0076] First, pour the plant-like slurry into the casting mold tray, place the casting mold tray on the bracket, and adjust the bracket so that the casting mold tray is in a horizontal position; then start the heating device to heat the plant-like slurry in the casting mold tray, so that the solvent of the plant-like slurry gradually evaporates. As the solvent evaporates, the solute concentration of the plant-like slurry gradually increases. After all the solvent of the plant-like slurry has evaporated, solute crystallization is obtained and a solid film is formed; finally, turn off the heating device. After the solid film has completely cooled, peel it off from the casting mold tray to obtain the bionic vegetation.

[0077] Among them, the heating temperature is 60°C.

[0078] In step 2, the process of making the artificial grass monofilament from the bionic vegetation by melt spinning is as follows:

[0079] Feed the bionic vegetation into the feed port of the melt spinning equipment, and melt extrude through a twin-screw extruder to obtain a primary monofilament; shape the primary monofilament through a hot plate and a hot plate to obtain an artificial grass monofilament.

[0080] Among them, the spinning temperature is 220°C; the temperature of the hot plate is 50°C, and the temperature of the hot plate is 110°C.

[0081] In step 3, a melt extrusion process is used to prepare the reinforcing layer, and the specific process is as follows:

[0082] First, add the preheated core layer rubber material into the feed port of the extruder through a hopper. Then, the core layer rubber material is heated to a sufficient temperature and melted in the screw cavity of the extruder. Then, the melted core layer rubber material is quickly extruded and coated on the fabric core. Under the action of pressure, the melted core layer rubber material flows into the pores in the fabric core and cures on the surface of the fabric core, so that the reinforcing layer has good mechanical properties.

[0083] On the other hand, this embodiment provides an application of the artificial grass suitable for camouflage as described above in the field of camouflage.

[0084] Example 2

[0085] On the one hand, this embodiment provides an artificial grass suitable for camouflage, including a back layer 1 and an artificial grass monofilament 2. The back layer 1 includes a first glue layer 11, a reinforcing layer 12, and a second glue layer 13 that are stacked in sequence from bottom to top. The artificial grass monofilament 2 is bonded to the surface of the first glue layer 11;

[0086] The artificial grass monofilament 2 is made by melt spinning from bionic vegetation;

[0087] As Figure 2 shown, the reinforcing layer 12 includes multiple fabric cores 121, and a core layer rubber material 122 is provided between any two adjacent fabric cores 121 and connected through the core layer rubber material 122.

[0088] Specifically, the fabric core 121 has 7 layers.

[0089] In this embodiment, both the first adhesive layer 11 and the second adhesive layer 13 are chlorosulfonated polyethylene rubbers.

[0090] Specifically, the fabric core 121 is made of nylon cloth; the core layer rubber compound 122 is made of styrene-butadiene rubber.

[0091] Furthermore, the bionic vegetation is prepared from a bionic plant slurry through a solution casting process;

[0092] The bionic plant slurry comprises the following components in parts by weight: 65 parts of chlorophyll derivative, 40 parts of polyvinyl alcohol, 0.05 part of calcium chloride, 1 part of carbon nanotubes, and 0.15 part of polyoxypropylene glycerol ether.

[0093] In this embodiment, the structural formula of the chlorophyll derivative is as follows:

[0094]

[0095] On the other hand, this embodiment provides a method for preparing artificial grass suitable for camouflage. Based on the artificial grass described in this embodiment, the method includes the following steps:

[0096] Step 1: Prepare the chlorophyll derivative: Weigh copper acetate and chlorophyll in a molar ratio of 1:1, then dissolve the chlorophyll in ethanol to obtain a chlorophyll solution, dissolve the copper acetate in ethanol to obtain an aqueous copper acetate solution, and finally mix the chlorophyll solution and the aqueous copper acetate solution, and prepare the chlorophyll derivative by an ion exchange process;

[0097] Step 2: Prepare the artificial grass filaments 2: Weigh 65 parts of chlorophyll derivative, 40 parts of polyvinyl alcohol, 0.05 part of calcium chloride, 1 part of carbon nanotubes, and 0.15 part of polyoxypropylene glycerol ether, and mix them evenly to obtain a bionic plant slurry. Then, form the bionic vegetation from the bionic plant slurry through a solution casting process, and finally produce the artificial grass filaments 2 from the bionic vegetation through melt spinning;

[0098] Step 3: Prepare the artificial grass: Lay the first adhesive layer 11, the reinforcement layer 12, and the second adhesive layer 13 on the lower mold of the molding die from bottom to top in sequence, close the upper and lower molds of the molding die, and make the first adhesive layer 11, the reinforcement layer 12, and the second adhesive layer 13 form an integral body through heating and pressing. After the heating and pressing are completed, perform cooling and pressure relief to obtain the back layer 1. Finally, bond the artificial grass filaments 2 to the surface of the first adhesive layer 11 using polyurethane adhesive, and the target artificial grass is obtained.

[0099] Among them, in Step 1, the volume ratio of the chlorophyll to ethanol is 1:7;

[0100] The volume ratio of the copper acetate to the ethanol is 1:10;

[0101] The volume ratio of the chlorophyll solution to the copper acetate aqueous solution is 1:1.2;

[0102] During the ion replacement process, the replacement temperature is set at 115 °C and the replacement reaction time is 35 min.

[0103] In Step 2, during the mixing process, a homogenizing disperser is used for mixing and stirring, the stirring speed is set at 300 r / min, and the stirring time is 45 min;

[0104] In Step 2, the process of forming the bionic vegetation from the bionic plant slurry by the solution casting process is as follows:

[0105] First, pour the bionic plant slurry into the casting tray, place the casting tray on the bracket, and adjust the bracket so that the casting tray is in a horizontal position; then start the heating device to heat the bionic plant slurry in the casting tray, so that the solvent of the bionic plant slurry gradually evaporates. As the solvent evaporates, the solute concentration of the bionic plant slurry gradually increases. After all the solvent of the bionic plant slurry has evaporated, solute crystallization is obtained and a solid film is formed; finally, turn off the heating device. After the solid film has completely cooled, peel it off from the casting tray to obtain the bionic vegetation;

[0106] Among them, the heating temperature is 100 °C;

[0107] In Step 2, the process of forming artificial grass monofilaments from the bionic vegetation by melt spinning is as follows:

[0108] Feed the bionic vegetation into the feed port of the melt spinning equipment, and melt extrude through a twin-screw extruder to obtain primary monofilaments; subject the primary monofilaments to sizing on a hot plate and a hot plate to obtain artificial grass monofilaments;

[0109] Among them, the spinning temperature is 245 °C; the temperature of the hot plate is 60 °C, and the temperature of the hot plate is 120 °C.

[0110] In Step 3, a melt extrusion process is used to prepare the reinforcing layer, and the specific process is as follows:

[0111] First, add the preheated core layer rubber material into the feed port of the extruder through a hopper. Then, the core layer rubber material is heated to a sufficient temperature and melted in the screw cavity of the extruder. Then, the melted core layer rubber material is quickly extruded and coated on the fabric core. Under the action of pressure, the melted core layer rubber material flows into the pores in the fabric core and cures on the surface of the fabric core, so that the reinforcing layer has good mechanical properties.

[0112] On the other hand, this embodiment provides an application of the artificial grass applicable to camouflage in the field of camouflage as described above.

[0113] Example 3

[0114] On one hand, this embodiment provides an artificial grass applicable to camouflage, including a back layer 1 and artificial grass filaments 2. The back layer 1 includes a first adhesive layer 11, a reinforcing layer 12, and a second adhesive layer 13 that are stacked in sequence from bottom to top. The artificial grass filaments 2 are bonded to the surface of the first adhesive layer 11.

[0115] The artificial grass filaments 2 are obtained by melt spinning of bionic vegetation.

[0116] As Figure 2 shown, the reinforcing layer 12 includes multiple fabric cores 121. A core layer adhesive 122 is provided between any two adjacent fabric cores 121 and they are connected through the core layer adhesive 122.

[0117] Specifically, the fabric core 121 is 3 layers.

[0118] In this embodiment, both the first adhesive layer 11 and the second adhesive layer 13 are chlorosulfonated polyethylene rubber.

[0119] Specifically, the fabric core 121 is made of fiberglass cloth; the core layer adhesive 122 is made of nitrile rubber.

[0120] Furthermore, the bionic vegetation is obtained by solution casting of bionic plant slurry.

[0121] The bionic plant slurry includes the following components in parts by weight: 72 parts of chlorophyll derivative, 50 parts of polyvinyl alcohol, 0.3 part of calcium chloride, 5 parts of graphite, and 1 part of polyoxypropylene glycerol ether.

[0122] In this embodiment, the structural formula of the chlorophyll derivative is as follows:

[0123]

[0124] On the other hand, this embodiment provides a preparation method of the artificial grass applicable to camouflage. Based on the artificial grass described in this embodiment, it includes the following steps:

[0125] Step 1, prepare chlorophyll derivative: Weigh copper acetate and chlorophyll in a molar ratio of 1:1, then dissolve the chlorophyll in ethanol to obtain a chlorophyll solution, dissolve the copper acetate in ethanol to obtain a copper acetate aqueous solution, and finally mix the chlorophyll solution and the copper acetate aqueous solution and use an ion exchange process to prepare the chlorophyll derivative.

[0126] Step 2. Prepare artificial grass monofilament 2: Weigh 72 parts of chlorophyll derivative, 50 parts of polyvinyl alcohol, 0.3 part of calcium chloride, 5 parts of graphite, and 1 part of polyoxypropylene glycerol ether, and mix them evenly to obtain a plant-like slurry. Then, the plant-like slurry is made into a bionic vegetation through a solution casting process. Finally, the bionic vegetation is made into artificial grass monofilament 2 through melt spinning;

[0127] Step 3. Prepare artificial grass: Lay the first adhesive layer 11, the reinforcing layer 12, and the second adhesive layer 13 on the lower mold of the forming mold from bottom to top in sequence. Close the upper and lower molds of the forming mold, and make the first adhesive layer 11, the reinforcing layer 12, and the second adhesive layer 13 into a whole through heating and pressing. After the heating and pressing are completed, cool and depressurize to obtain the back layer 1. Finally, bond the artificial grass monofilament 2 to the surface of the first adhesive layer 11 with polyurethane adhesive to obtain the target artificial grass.

[0128] Among them, in Step 1, the volume ratio of the chlorophyll to ethanol is 1:10;

[0129] The volume ratio of the copper acetate to ethanol is 1:8;

[0130] The volume ratio of the chlorophyll solution to the copper acetate aqueous solution is 1:1.5;

[0131] During the ion replacement process, set the replacement temperature to 135 °C and the replacement reaction time to 20 min.

[0132] In Step 2, during the mixing process, use a homogenizing disperser for mixing and stirring, set the stirring speed to 500 r / min, and the stirring time to 30 min;

[0133] In Step 2, the process of making the plant-like slurry into a bionic vegetation through a solution casting process is as follows:

[0134] First, pour the plant-like slurry into a casting tray, place the casting tray on a bracket, and adjust the bracket so that the casting tray is in a horizontal position; then start the heating device to heat the plant-like slurry in the casting tray to gradually evaporate the solvent of the plant-like slurry. As the solvent evaporates, the solute concentration of the plant-like slurry gradually increases. After all the solvent of the plant-like slurry has evaporated, solute crystallization is obtained and a solid film is formed; finally, turn off the heating device. After the solid film is completely cooled, peel it off from the casting tray to obtain the bionic vegetation;

[0135] Among them, the heating temperature is 150 °C;

[0136] In Step 2, the process of making the bionic vegetation into artificial grass monofilament through melt spinning is as follows:

[0137] Feed the bionic vegetation into the feed port of a melt spinning device, and melt extrude it through a twin-screw extruder to obtain virgin monofilaments; subject the virgin monofilaments to shaping by a hot plate and a hot disc to obtain artificial grass monofilaments.

[0138] Among them, the spinning temperature is 260 °C; the temperature of the hot disc is 70 °C, and the temperature of the hot plate is 130 °C.

[0139] In step 3, a melt extrusion process is used to prepare the reinforcement layer, and the specific process is as follows:

[0140] First, preheat the core layer rubber compound and add it through a hopper to the feed port of the extruder. Then, heat the core layer rubber compound in the screw cavity of the extruder to a sufficient temperature and melt it. Next, quickly extrude the molten core layer rubber compound and coat it on the fabric core. Under the action of pressure, the molten core layer rubber compound flows into the pores in the fabric core and cures on the surface of the fabric core, enabling the reinforcement layer to have good mechanical properties.

[0141] On the other hand, this embodiment provides an application of the artificial grass suitable for camouflage as described above in the field of camouflage.

[0142] Example 4

[0143] This embodiment is basically the same as Example 1, except that: the fabric core 121 is made of acrylic cloth; the core layer rubber compound 122 is made of chloroprene rubber.

[0144] The plant-like slurry comprises the following components in parts by weight: 80 parts of chlorophyll derivative, 55 parts of polyvinyl alcohol, 2 parts of calcium chloride, 8 parts of carbonyl iron powder, and 2 parts of polyoxypropylene polyoxyethylene glycerol ether.

[0145] Example 5

[0146] This embodiment is basically the same as Example 1, except that: the fabric core 121 is made of polytetrafluoroethylene fiber cloth; the core layer rubber compound 122 is made of ethylene propylene diene monomer rubber.

[0147] The plant-like slurry comprises the following components in parts by weight: 95 parts of chlorophyll derivative, 42 parts of polyvinyl alcohol, 5 parts of lithium chloride, 12 parts of carbonyl nickel powder, and 3 parts of polydimethylsiloxane.

[0148] Example 6

[0149] This embodiment is basically the same as Example 1, except that: the fabric core 121 is made of aramid fiber cloth; the core layer rubber compound 122 is made of fluororubber.

[0150] The plant-like slurry comprises the following components in parts by weight: 110 parts of chlorophyll derivative, 50 parts of polyvinyl alcohol, 8 parts of lithium chloride, 8 parts of carbon black, 7 parts of graphite, and 4 parts of polyoxyethylene polyoxypropylene amine ether.

[0151] Example 7

[0152] This embodiment is basically the same as Embodiment 1, except that: the fabric core 121 is made of carbon fiber cloth; the core layer rubber 122 is made of polyurethane rubber.

[0153] The plant-mimicking sizing agent comprises the following components in parts by weight: 110 parts of chlorophyll derivative, 120 parts of chlorophyll derivative, 60 parts of polyvinyl alcohol, 10 parts of lithium chloride, 12 parts of carbon black, 8 parts of carbon nanotubes, 2 parts of polyoxyethylene polyoxypropylene pentaerythritol ether, and 3 parts of polyoxyethylene polyoxypropylene amine ether.

[0154] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0155] It should be understood that the present invention is not limited to the above-described content and can be variously modified and changed without departing from its scope. The scope of the present invention is only limited by the appended claims.

Claims

1. An artificial grass suitable for camouflage, characterized in that: It comprises a backing layer (1) and artificial grass monofilaments (2), wherein the backing layer (1) comprises a first adhesive layer (11), a reinforcing layer (12) and a second adhesive layer (13) which are stacked in sequence from bottom to top, and the artificial grass monofilaments (2) are connected to the surface of the first adhesive layer (11); The artificial grass monofilament (2) is made from bionic vegetation by melt spinning; The reinforcement layer (12) comprises a multi-layer fabric core (121), and a core layer rubber material (122) is provided between any two adjacent layers of the fabric core (121), and the two layers are connected via the core layer rubber material (122).

2. The artificial grass suitable for camouflage according to claim 1, characterized in that: The first rubber layer (11) and the second rubber layer (13) are both made of chlorosulfonated polyethylene rubber.

3. The artificial grass suitable for camouflage according to claim 1, characterized in that: The bionic vegetation is made from bionic plant slurry through a solution casting process; The plant-imitation slurry comprises the following components in parts by weight: 50-120 parts of chlorophyll derivatives, 30-60 parts of polyvinyl alcohol, 0.01-10 parts of moisture absorbent, 0.1-20 parts of electromagnetic scattering regulator and 0.01-5 parts of defoaming agent.

4. The artificial grass suitable for camouflage according to claim 3, characterized in that: The chlorophyll derivatives include the following structural formula:

5. The artificial grass suitable for camouflage according to claim 3, characterized in that: The desiccant is a metal chloride, and the metal chloride is selected from calcium chloride or lithium chloride; The electromagnetic scattering regulator is at least one of carbon black, graphite, carbon nanotubes, carbonyl iron powder and carbonyl nickel powder; The defoaming agent is at least one of polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropanolamine ether, polyoxypropylene glycerol ether, polyoxypropylene polyoxyethylene glycerol ether and polydimethylsiloxane.

6. The artificial grass suitable for camouflage according to claim 1, characterized in that: The fabric core (121) is any one of polyester fabric, nylon fabric, acrylic fabric, glass fiber fabric, polytetrafluoroethylene fiber fabric, aramid fiber fabric, and carbon fiber fabric; The core layer rubber material (122) is any one of polyurethane rubber, styrene-butadiene rubber, nitrile rubber, chloroprene rubber, EPDM rubber and fluororubber.

7. A method for preparing artificial grass suitable for camouflage, characterized in that: The artificial grass according to any one of claims 1 to 6 comprises the following steps: Step 1, preparing a chlorophyll derivative: weighing copper acetate and chlorophyll in proportion, then dissolving the chlorophyll in ethanol to obtain a chlorophyll solution, then dissolving the copper acetate in ethanol to obtain a copper acetate aqueous solution, and finally mixing the chlorophyll solution and the copper acetate aqueous solution, and preparing a chlorophyll derivative by an ion replacement process; Step 2, preparing artificial grass monofilaments (2): weighing chlorophyll derivatives, polyvinyl alcohol, hygroscopic agent, electromagnetic scattering regulator and defoaming agent in proportion, and mixing them evenly to obtain plant-like slurry, and then preparing bionic vegetation from the plant-like slurry through a solution casting process, and finally preparing artificial grass monofilaments (2) from the bionic vegetation through melt spinning; Step 3, preparing artificial grass: laying the first adhesive layer (11), the reinforcing layer (12) and the second adhesive layer (13) on a forming mold from bottom to top in sequence, then heating and pressing the forming mold, cooling and releasing the pressure after the heating and pressing are completed, thereby obtaining a backing layer (1), and finally using an adhesive to bond the artificial grass monofilament (2) to the surface of the first adhesive layer (11), thereby obtaining the target artificial grass.

8. The method for preparing artificial grass suitable for camouflage according to claim 7, characterized in that: In step 1, the molar ratio of copper acetate to chlorophyll is 1:1; The volume ratio of chlorophyll to ethanol is 1:5-10; The volume ratio of copper acetate to ethanol is 1:5-10; The volume ratio of the chlorophyll solution to the copper acetate aqueous solution is 1:1 to 1.5; During the ion replacement process, the replacement temperature is set at 100° C. to 135° C., and the replacement reaction time is 20 min to 50 min.

9. The method for preparing artificial grass suitable for camouflage according to claim 7, characterized in that: In step 2, during the mixing process, a homogenizer is used for mixing and stirring, and the stirring speed is set to 200r / min to 500r / min, and the stirring time is 30min to 60min; In step 3, during the heating and pressing process, the pressing pressure is set to 0.5 MPa to 3.5 MPa, the pressing time is set to 30 min to 60 min, and the heating temperature is set to 100° C. to 180° C.

10. Use of the artificial grass suitable for camouflage according to any one of claims 1 to 6 in the field of camouflage.

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