Iridescence screen cloth and preparation method thereof

Abstract

The present application relates to the technical field of the mesh cloth film, disclose a kind of dazzling mesh cloth film and preparation method thereof, the preparation method includes the back of mesh cloth layer is coated to form PVC bottom pulp layer, the front of mesh cloth layer is coated to form the mixed pulp layer by first PVC color paste and second PVC color paste, hot-pressing composite face film layer or bottom film layer.The preparation method is by coating PVC bottom pulp on mesh cloth layer, to cover the mesh cloth layer of porous structure;First PVC color paste and second PVC color paste are in turn sprayed on the front of mesh cloth layer using the process that mesh cloth layer continuously moves in downstream direction, after simple mixing, the visual effect of dazzling, gradual color of first PVC color paste and second PVC color paste formed by different colors is formed, to improve the aesthetic of product.

Description

Technical Field

[0001] This invention relates to the technical field of mesh fabric films, and particularly to a colorful mesh fabric film and its preparation method. Background Technology

[0002] Fiber mesh film is a composite material, generally made of fiber mesh and one or more layers of film bonded together using a coating process. It combines the strength and flexibility of the fiber mesh with the waterproof, dustproof, and weather-resistant properties of the film. Depending on the application, the film can be made of PVC, PE, TPU, etc. Existing colored fiber mesh film series generally achieve this by changing the color of the film paste, or by printing other patterns on the surface of the colored fiber mesh film to enhance the product's visual appeal. However, achieving a vibrant color across the entire surface of the fiber mesh film through printing consumes a lot of ink, resulting in high costs. Furthermore, this type of post-printing on the product surface is prone to fading or peeling over time.

[0003] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a colorful mesh fabric film and its preparation method, which aims to apply two or more colored pastes onto the mesh fabric, and after drying, form a colorful film layer on the product, so that the surface of the product presents a colorful visual effect.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A method for preparing a colorful mesh fabric film includes the following steps: S1. After coating the back of the mesh layer with PVC primer, heat and dry to form a PVC primer layer; S2. Apply a first PVC color paste and a second PVC color paste of a different color to the front of the mesh layer in sequence. The outlet of the first PVC color paste is located upstream of the outlet of the second PVC color paste. As the mesh layer moves downstream after the PVC base layer is formed, the first PVC color paste and the second PVC color paste are mixed and a mixed paste layer is formed on the front of the mesh layer. S3. The mesh fabric with the mixed slurry layer is heated and shaped in an oven to produce a semi-finished product; S4. A composite film is hot-pressed onto the upper surface of the mixed slurry layer to form a composite film layer, and / or a base film is hot-pressed onto the lower surface of the PVC base slurry layer to form a base film layer.

[0006] In the method for preparing the colorful mesh fabric film, in step S1, the amount of PVC base slurry applied is 100-400 g / m³. 2The viscosity of the PVC substrate is 600–1500 mPa·s.

[0007] The method for preparing the colorful mesh fabric film includes a heating and drying temperature of 180-200℃ and a machine linear speed of 15±2m / min.

[0008] In the method for preparing the colorful mesh fabric film, in step S2, the viscosity of the first PVC color paste is 6000-8000 mPa·s; and the viscosity of the second PVC color paste is 2000-3500 mPa·s.

[0009] The method for preparing the colorful mesh fabric film includes the following steps: First PVC color paste flows out through multiple outlets of a moving die head to a cutter head located below it; the cutter head has multiple cutting edges, the same number as the outlets of the moving die head, all of which extend upstream, and the outlets of the moving die head are located directly above the corresponding cutting edges; the first PVC color paste flowing out from the outlets of the moving die head gradually flows along the height direction of the corresponding cutting edge to the end of the cutting edge and then flows to the front side of the mesh fabric layer; second PVC color paste flows out through multiple outlets of a fixed die head to the first PVC color paste or the mesh fabric layer located below it.

[0010] The method for preparing the colorful mesh fabric film includes a moving mold head connected to a transverse drive mechanism mounted on a machine base. The transverse drive mechanism is used to drive the moving mold head to reciprocate along the width direction of the machine base.

[0011] In the method for preparing the colorful mesh fabric film, a scraper that can be raised or lowered is provided downstream of the fixed mold head, and the scraper is used to smooth the mixed slurry layer.

[0012] In the preparation method of the colorful mesh fabric film, in step S3, the temperature of the oven is 180-200℃.

[0013] In the preparation method of the colorful mesh fabric film, in step S4, the face film is preheated by a preheating wheel at a temperature of 80±3℃, then heated by a main wheel at a temperature of 160±3℃, and finally drawn out by a lead-out wheel at a temperature of 160±3℃; the base film is heated by a main wheel at a temperature of 165±3℃, and then drawn out by a lead-out wheel at a temperature of 80±3℃; the pressure of the pressure rollers during hot-pressing composite face film, semi-finished product, and base film is 30MPa.

[0014] A colorful mesh fabric film is prepared by the method described above. The colorful mesh fabric film includes, from bottom to top, a base film layer, a PVC base layer, a mesh layer, a mixed paste layer composed of a first PVC color paste layer and a second PVC color paste layer, and a face film layer.

[0015] Beneficial effects: This invention provides a colorful mesh fabric film and its preparation method. The preparation method involves coating the back of the mesh fabric layer with a PVC base paste to cover the porous mesh fabric layer. Then, as the mesh fabric layer moves downstream, a first PVC color paste and a second PVC color paste are successively applied to the mesh fabric layer. After simple mixing, the first and second PVC color pastes, composed of different colors, form a colorful and gradient color visual effect, thereby enhancing the aesthetics of the product. Attached Figure Description

[0016] Figure 1 This is a product image with a white background and black lines after the mixed slurry layer in Example 1 has been smoothed with a scraper.

[0017] Figure 2 This is a product image of the yellow-based, red-green-lined product obtained in Example 2.

[0018] Figure 3 This is a product image of the rose-red background with blue lines obtained in Example 3.

[0019] Figure 4 A schematic diagram of the equipment used for applying the first and second PVC color pigments.

[0020] Explanation of main component symbols: 1-moving mold head, 2-fixed mold head, 3-cutting head, 31-cutting edge, 4-transverse drive mechanism, 5-scraper. Detailed Implementation

[0021] This invention provides a colorful mesh fabric film and its preparation method. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the invention and are not intended to limit the scope of protection of the invention.

[0022] This invention provides a method for preparing a colorful mesh fabric film, comprising the following steps: S1. After coating the back of the mesh layer with PVC primer, heat and dry to form a PVC primer layer. First, apply the PVC primer to the surface of the fiber mesh layer using a roller coating method. This fills the porous structure of the fiber mesh layer, preventing the first and second PVC color pastes from seeping from the upper surface to the lower surface during subsequent application, thus affecting the overall aesthetics of the product. More specifically, the roller coating method can be achieved using two rotating rollers and a hopper arranged vertically. The lower rotating roller is immersed in the hopper containing the PVC primer. The mesh passes between the two rotating rollers. When the two rotating rollers rotate under the action of a power source, they transfer the PVC primer from the hopper to the lower rotating roller, and then to the mesh, thus coating the mesh.

[0023] Specifically, the amount of PVC primer applied is 100–400 g / m³. 2 The viscosity of the PVC primer is 600–1500 mPa·s. The above-mentioned amount of primer can fully cover the mesh layer, avoiding any impact on product strength. Excessive primer application, however, will result in waste, increased costs, and a thicker PVC primer layer, leading to longer drying times. When the viscosity of the PVC primer is within the above range, it has good fluidity, which is beneficial for compatibility with roller coating methods, allowing it to evenly cover the surface of the mesh layer and ensuring good penetration and surface smoothness.

[0024] More specifically, the temperature for heating and drying the PVC primer is 180–200℃, and the machine's linear speed is 15±2 m / min. This temperature range ensures the PVC primer is cured and set without damaging its properties, maintaining its good toughness. Furthermore, the set PVC primer will not stick to the guide rollers during transport. The machine's linear speed is not only related to the application speed, curing degree, and drying temperature of the PVC primer, but also closely related to the subsequent application of the first and second PVC color pigments. When the machine speed is too slow, the two different colors of the first and second PVC color pigments will mix together, resulting in indistinct color layers and a poorer vibrant effect. Conversely, when the machine speed is too fast, the PVC primer, first PVC color pigment, and second PVC color pigment will not cure sufficiently, causing them to stick to the rollers.

[0025] S2. A first PVC color paste and a second PVC color paste of a different color are sequentially applied to the front side of the mesh layer. The outlet of the first PVC color paste is located upstream of the outlet of the second PVC color paste. As the mesh layer, after forming the PVC base layer, moves downstream, the first and second PVC color pastes mix, forming a mixed paste layer on the upper surface of the PVC base layer. The distance between the outlets of the first and second PVC color pastes is small. When the first PVC color paste is applied to the front side of the mesh layer from the outlet, as the mesh continues to move downstream, the fluid first PVC color paste applied to it can immediately mix with the subsequently applied second PVC color paste, creating a dazzling color effect during the mixing process.

[0026] Specifically, in step S2, the viscosity of the first PVC color paste is 6000–8000 mPa·s; the viscosity of the second PVC color paste is 2000–3500 mPa·s. That is, the first PVC color paste has a very high viscosity and relatively poor fluidity, while the second PVC color paste has a relatively low viscosity and good fluidity on the upper surface of the mesh layer. This allows the color of the first PVC color paste to be more pronounced on the surface of the mesh layer. Simultaneously, as the second and first PVC color pastes are mixed, the two colors will blend. Since the mixing time is short, i.e., insufficient, a gradient color visual effect will be formed on the surface of the finished product.

[0027] Please see Figure 4In some embodiments, the first PVC color paste flows out through multiple outlets of the moving die head 1 to the cutter head 3 located below it, and the cutter head 3 has multiple cuts 31 with the same number of cuts as the outlets of the moving die head 1. The multiple cuts 31 extend in an upstream direction, and the outlets of the multiple moving die heads 1 are located directly above the corresponding cuts 31. The first PVC color paste flowing out from the outlet of the moving die head 1 gradually flows along the height direction of the corresponding cuts 31 to the end of the cuts 31 and then flows to the front of the mesh layer. The second PVC color paste flows out through multiple outlets of the fixed die head 2 to the first PVC color paste or the mesh layer located below it. In other words, multiple outlets of the moving die head 1 simultaneously output the first PVC color paste, which flows downwards along the direction of the corresponding blade 31 on the cutter head 3 to the end of the blade 31. Upon reaching the mesh layer, it immediately comes into contact with the second PVC color paste downstream of the first. Due to the high viscosity of the first PVC color paste and its much smaller output volume compared to the second, coupled with the continuous downstream conveying of the mesh, the second PVC color paste quickly mixes with the first, creating a visual effect of two colors blending. Furthermore, by controlling the opening and closing of the outlets for the first PVC color paste in the moving die head 1 and the second PVC color paste in the fixed die head 2—that is, controlling the output speed of the first and second PVC color pastes—the mixing ratio can be controlled, resulting in a variety of color variations in the product.

[0028] Furthermore, the first PVC color paste can be composed of two or more color pastes, which flow out from the outlets of different moving mold heads 1, so that it can be combined with the second PVC color paste as the base color paste to form a variety of dazzling and gradient color effects.

[0029] In this embodiment, the moving die head 1 is connected to a transverse drive mechanism 4 mounted on the machine base. The transverse drive mechanism 4 is used to drive the moving die head 1 to reciprocate along the width direction of the machine base. Since the first PVC color paste output from the pulp outlet of the moving die head 1 is linear, the transverse drive mechanism 4 drives the moving die head 1 to reciprocate laterally, allowing the linear first PVC color paste to "wander" on the upper surface of the mesh layer, widening the coverage area of ​​the first PVC color paste, thereby increasing the range of color and gradient effects that can be formed on the product.

[0030] In this embodiment, a scraper 5 that can be raised or lowered is also provided downstream of the fixed mold head 2. The scraper 5 is used to smooth the mixed slurry layer. By adjusting the distance between the scraper 5 and the upper surface of the product, the thickness / amount of the mixed slurry layer can be adjusted. That is, the distance between the scraper 5 and the upper surface of the product is determined according to the thickness of the produced product, thereby smoothing the uneven surface of the mixed slurry and making the surface of the product flat and smooth.

[0031] S3. The mesh fabric with the mixed slurry layer is heated and shaped in an oven to produce a semi-finished product. Specifically, the oven temperature is 180-200℃. The heat from the oven accelerates the curing and shaping of the mixed slurry, preventing it from not drying properly and sticking to the rollers during transport.

[0032] S4. A surface film is hot-pressed onto the upper surface of the mixed slurry layer to form a surface film layer, and / or a base film is hot-pressed onto the lower surface of the PVC base slurry layer to form a base film layer. In actual production, depending on the product's application, usage scenario, or customer needs, a surface film or a base film, or both, can be hot-pressed together. This surface film or base film can be a colored or transparent PVC film to protect the product or further enhance its visual appeal.

[0033] Specifically, in step S4, the face mask is preheated by a preheating wheel at 80±3℃, then heated by a main wheel at 160±3℃, and finally drawn out by a lead-out wheel at 160±3℃; the base film is heated by a main wheel at 165±3℃, and then drawn out by a lead-out wheel at 80±3℃; the pressure of the pressure rollers during hot-pressing composite of the face mask, semi-finished product, and base film is 30MPa. Preheating the face mask or base film softens it, increasing its melting point, thus allowing for better adhesion to the semi-finished product during hot pressing. This ensures strong adhesion between the semi-finished product and the face / base film, making the finished product more durable and improving its surface smoothness, giving it decorative, waterproof, or wear-resistant properties. Face masks and base films that are not uniformly preheated may wrinkle or develop internal air bubbles during hot pressing due to localized rapid heating. Preheated face masks and base films are heated more evenly, avoiding these problems.

[0034] This invention also provides a colorful mesh fabric film, prepared by the aforementioned method. The colorful mesh fabric film comprises, from bottom to top, a base film layer, a PVC base layer, a mesh layer, a mixed paste layer composed of a first PVC color paste layer and a second PVC color paste layer, and a face film layer. Specifically, when there is no hot-pressed composite base film, the colorful mesh fabric film comprises a PVC base layer, a mesh layer, a mixed paste layer composed of a first PVC color paste layer and a second PVC color paste layer, and a face film layer. When there is no hot-pressed composite face film, the colorful mesh fabric film comprises a base film layer, a PVC base layer, a mesh layer, and a mixed paste layer composed of a first PVC color paste layer and a second PVC color paste layer.

[0035] To further illustrate the colorful mesh fabric film and its preparation method provided by the present invention, the following embodiments are provided.

[0036] Example 1 A method for preparing a colorful mesh fabric film includes the following steps: S1. After coating the back of the mesh layer with PVC primer, heat and dry to form a PVC primer layer.

[0037] Specifically, the amount of PVC primer applied is 400g / m³. 2 The viscosity of the PVC substrate is 1200 mPa·s.

[0038] More specifically, the temperature for heating and drying the PVC primer is 200℃, and the linear speed of the machine is 15m / min.

[0039] S2. A first PVC color paste (black) and a second PVC color paste (white), different in color from the first PVC color paste, are sequentially applied to the front side of the mesh layer. The outlet of the first PVC color paste is located upstream of the outlet of the second PVC color paste. As the mesh layer, after forming the PVC base layer, moves downstream, the first and second PVC color pastes mix and form a mixed paste layer on the upper surface of the mesh layer. The first PVC color paste flows out through multiple outlets of the moving die head to the cutter head located below it. The cutter head has multiple cutting edges, the same number as the number of outlets of the moving die head, all of which extend upstream, and the outlets of the moving die head are located directly above the corresponding cutting edges. The first PVC color paste flowing out from the outlet of the moving die head gradually flows along the height direction of the corresponding cutting edge to the end of the cutting edge and then to the upper surface of the mesh layer. The second PVC color paste flows out through multiple outlets of the fixed die head to the first PVC color paste or the mesh layer located below it.

[0040] Specifically, the viscosity of the first PVC color paste is 6000 mPa·s; the viscosity of the second PVC color paste is 3000 mPa·s.

[0041] The moving mold head is connected to a transverse drive mechanism mounted on the machine base. The transverse drive mechanism is used to drive the moving mold head to reciprocate along the width direction of the machine base.

[0042] Downstream of the fixed mold head, there is also a scraper that can be raised or lowered, which is used to smooth the mixed slurry layer.

[0043] S3. The mesh fabric with the mixed slurry layer is heated and shaped in an oven to produce a semi-finished product. Specifically, the oven temperature is 200℃.

[0044] S4. A composite film is hot-pressed onto the upper surface of the mixed slurry layer to form a composite film layer, and a base film is hot-pressed onto the lower surface of the PVC base slurry layer to form a base film layer.

[0045] Specifically, the face mask is preheated by a preheating wheel at 78°C, then heated by a main wheel at 160°C, and finally drawn out by a lead-out wheel at 161°C; the base film is heated by a main wheel at 163°C, and then drawn out by a lead-out wheel at 80°C; the pressure of the pressure rollers during hot-pressing composite face mask, semi-finished product, and base film is 30MPa.

[0046] Example 2 A method for preparing a colorful mesh fabric film includes the following steps: S1. After coating the back of the mesh layer with PVC primer, heat and dry to form a PVC primer layer.

[0047] Specifically, the amount of PVC primer applied is 250g / m³. 2 The viscosity of the PVC substrate is 1500 mPa·s.

[0048] More specifically, the temperature for heating and drying the PVC primer is 180℃, and the linear speed of the machine is 16m / min.

[0049] S2. A first PVC color paste (red, green) and a second PVC color paste (yellow) of a different color are sequentially applied to the front of the mesh layer. The outlet of the first PVC color paste is located upstream of the outlet of the second PVC color paste. As the mesh layer moves downstream after the formation of the PVC base layer, the first and second PVC color pastes are mixed, forming a mixed paste layer on the upper surface of the mesh layer. The first PVC color paste flows out through multiple outlets of the moving die head to the cutter head located below it. The cutter head has multiple cutting edges, the same number as the number of outlets of the moving die head, all of which extend upstream, and the outlets of the moving die head are located directly above the corresponding cutting edges. The first PVC color paste flowing out from the outlet of the moving die head gradually flows along the height direction of the corresponding cutting edge to the end of the cutting edge and then flows to the upper surface of the mesh layer. The second PVC color paste flows out through multiple outlets of the fixed die head to the first PVC color paste or the mesh layer located below it.

[0050] Specifically, the viscosity of the first PVC color paste is 7000 mPa·s; the viscosity of the second PVC color paste is 2200 mPa·s.

[0051] The moving mold head is connected to a transverse drive mechanism mounted on the machine base. The transverse drive mechanism is used to drive the moving mold head to reciprocate along the width direction of the machine base.

[0052] Downstream of the fixed mold head, there is also a scraper that can be raised or lowered, which is used to smooth the mixed slurry layer.

[0053] S3. The mesh fabric with the mixed slurry layer is heated and shaped in an oven to produce a semi-finished product. Specifically, the oven temperature is 180℃.

[0054] S4. A composite film is hot-pressed onto the upper surface of the mixed slurry layer to form a composite film layer, and a base film is hot-pressed onto the lower surface of the PVC base slurry layer to form a base film layer.

[0055] Specifically, the face mask is preheated by a preheating wheel at 82°C, then heated by a main wheel at 158°C, and finally drawn out by a lead-out wheel at 158°C; the base film is heated by a main wheel at 165°C, and then drawn out by a lead-out wheel at 77°C; the pressure of the pressure rollers during hot-pressing composite of the face mask, semi-finished product, and base film is 30MPa.

[0056] Example 3 A method for preparing a colorful mesh fabric film includes the following steps: S1. After coating the back of the mesh layer with PVC primer, heat and dry to form a PVC primer layer.

[0057] Specifically, the amount of PVC primer applied is 100g / m³. 2 The viscosity of the PVC substrate is 700 mPa·s.

[0058] More specifically, the temperature for heating and drying the PVC primer is 180℃, and the linear speed of the machine is 17m / min.

[0059] S2. A first PVC color paste (blue) and a second PVC color paste (rose red), different in color from the first PVC color paste, are sequentially applied to the front of the mesh layer. The outlet of the first PVC color paste is located upstream of the outlet of the second PVC color paste. As the mesh layer, after forming the PVC base layer, moves downstream, the first and second PVC color pastes mix and form a mixed paste layer on the upper surface of the mesh layer. The first PVC color paste flows out through multiple outlets of the moving die head to the cutter head located below it. The cutter head has multiple cutting edges, the same number as the number of outlets of the moving die head, all of which extend upstream, and the outlets of the moving die head are located directly above the corresponding cutting edges. The first PVC color paste flowing out from the outlet of the moving die head gradually flows along the height direction of the corresponding cutting edge to the end of the cutting edge and then to the upper surface of the mesh layer. The second PVC color paste flows out through multiple outlets of the fixed die head to the first PVC color paste or the mesh layer located below it.

[0060] Specifically, the viscosity of the first PVC color paste is 8000 mPa·s; the viscosity of the second PVC color paste is 3500 mPa·s.

[0061] The moving mold head is connected to a transverse drive mechanism mounted on the machine base. The transverse drive mechanism is used to drive the moving mold head to reciprocate along the width direction of the machine base.

[0062] Downstream of the fixed mold head, there is also a scraper that can be raised or lowered, which is used to smooth the mixed slurry layer.

[0063] S3. The mesh fabric with the mixed slurry layer is heated and shaped in an oven to produce a semi-finished product. Specifically, the oven temperature is 200℃.

[0064] S4. Apply a composite film to the upper surface of the mixed paste layer using hot pressing to form a film layer.

[0065] Specifically, the mask is preheated by a preheating wheel at 80°C, then heated by a main wheel at 160°C, and finally drawn out by a lead-out wheel at 160°C; the pressure of the pressure rollers during hot-pressing composite mask and semi-finished product is 30MPa.

[0066] The iridescent mesh fabric film prepared in Example 1 was tested, and the test results are shown in the table below:

[0067] The test results in the table above show that the colorful mesh fabric film prepared using this method exhibits excellent mechanical properties, peel strength, and cold-proof performance. This colorful mesh fabric film can be applied to inflatable cushions, such as swimming rings, inflatable mats for outdoor playgrounds, surfboards, and gymnastics mats. Furthermore, from... Figures 1-3 It can be seen that the surface of the product presents a single line (such as...) Figure 1 black and Figure 3 (blue), or multicolored lines (such as) Figure 2 The product is available in red and green, and features vibrant and gradient color changes. This preparation method can meet consumers' needs in terms of both product performance and color selection.

[0068] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0069] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0070] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0071] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A method for preparing a colorful mesh fabric film, characterized in that, Includes the following steps: S1. After coating the back of the mesh layer with PVC primer, heat and dry to form a PVC primer layer; S2. Apply a first PVC color paste and a second PVC color paste of a different color to the front of the mesh layer in sequence. The outlet of the first PVC color paste is located upstream of the outlet of the second PVC color paste. As the mesh layer with the PVC base layer moves downstream, the first PVC color paste and the second PVC color paste are mixed, forming a mixed paste layer on the front side of the mesh layer. The viscosity of the first PVC color paste is 6000-8000 mPa·s; the viscosity of the second PVC color paste is 2000-3500 mPa·s. The first PVC color paste flows out through multiple outlets of the moving die head to the cutter head located below it. The cutter head has multiple cutting edges with the same number as the outlets of the moving die head. All cutting edges extend upstream, and the outlets of the moving die head are located directly above the corresponding cutting edges. The first PVC color paste flowing out from the outlet of the moving die head gradually flows to the end of the corresponding blade along the height direction and then flows to the front side of the mesh layer; the second PVC color paste flows out through multiple outlets of the fixed die head to the first PVC color paste or the mesh layer below it; the moving die head is connected to a transverse drive mechanism set on the machine base, and the transverse drive mechanism is used to drive the moving die head to reciprocate along the width direction of the machine base; S3. The mesh fabric with the mixed slurry layer is heated and shaped in an oven to produce a semi-finished product; S4. A surface film is hot-pressed onto the upper surface of the mixed slurry layer to form a surface film layer, and / or a base film is hot-pressed onto the lower surface of the PVC base slurry layer to form a base film layer.

2. The method for preparing the colorful mesh fabric film according to claim 1, characterized in that, In step S1, the amount of PVC primer applied is 100-400 g / m³. 2 The viscosity of the PVC substrate is 600–1500 mPa·s.

3. The method for preparing the colorful mesh fabric film according to claim 2, characterized in that, The heating and drying temperature is 180-200℃, and the linear speed of the machine is 15±2m / min.

4. The method for preparing the colorful mesh fabric film according to claim 1, characterized in that, Downstream of the fixed mold head, there is also a scraper that can be raised or lowered, which is used to smooth the mixed slurry layer.

5. The method for preparing the colorful mesh fabric film according to claim 1, characterized in that, In step S3, the temperature of the oven is 180–200°C.

6. The method for preparing the colorful mesh fabric film according to claim 1, characterized in that, In step S4, the face mask is preheated by a preheating wheel at a temperature of 80±3℃, then heated by a main wheel at a temperature of 160±3℃, and finally drawn out by a lead-out wheel at a temperature of 160±3℃; the base film is heated by a main wheel at a temperature of 165±3℃, and then drawn out by a lead-out wheel at a temperature of 80±3℃; the pressure of the pressure rollers during hot-pressing composite face mask, semi-finished product, and base film is 30MPa.

Images