A glass fiber plate with a spray drawing pattern and local gold stamping and a preparation method thereof

Abstract

The application discloses a glass fiber plate with a spray drawing pattern and local gold stamping and a preparation method thereof. The spray drawing pattern is first formed on a release film, and then is transferred when the laminated hot pressing is completed, and meanwhile, the local gold stamping pattern is placed in the middle layer to participate in the forming. The process arranges the alignment, lamination and forming together, so that the on-site personnel can more easily check the placement direction and area position, the boundaries of the pattern and the gold stamping are more consistent, the connection of the subsequent processes is more smooth, and the rework probability is reduced. Meanwhile, the primer, the base coating, the texture transfer printing, the brightening film, the decorative effect layer and the hardening frosted layer are combined in sequence. The hierarchical relationship is clear, and the material selection space is larger. The process personnel can adjust the surface appearance and touch without changing the previous laminated structure, the product version switching is more convenient, the verification path is more clear, and the segmented inspection and problem positioning are facilitated, and the process stability is facilitated.

Description

Technical Field

[0001] This invention relates to the field of decorative molding technology for composite materials, specifically to a fiberglass board with spray-painted patterns and partial hot stamping, and its preparation method. Background Technology

[0002] Fiberglass boards are commonly used in electronic product exterior components and decorative panels. Current surface treatments typically involve screen printing or transfer film to create a color layer, followed by vacuum coating or electroplating to achieve a metallic sheen, and then using a hot-pressing mold to obtain a 2D or 3D shape. This type of process often involves multiple printing, lamination, curing, and post-processing steps, resulting in a large number of interface layers and requiring precise coordination between processes.

[0003] Existing solutions for gradient patterns, fine line graphics, and complex custom designs are often limited by printing resolution, material shrinkage, and registration errors. Localized metallic effects are mostly achieved through surface plating or hot stamping. However, these surface metallic or hot stamping layers are prone to edge roughness, localized cracking, or unstable adhesion during subsequent molding, matte finishing, and wear. In 3D modeling, pattern stretching and localized metallic area misalignment are even more likely to occur.

[0004] Therefore, there is an urgent need for an integrated method for patterning and localized hot stamping of fiberglass boards. This method needs to balance pattern precision, localized metal area positioning, and post-forming structural stability, while also being able to work in conjunction with subsequent surface decoration layer processes.

[0005] A search revealed a Chinese patent document disclosing a method and system for simulating coating texture features [Application No.: 201810173298.4, Publication No.: CN110216983B]. This method includes printing an image on a printing medium; spraying a first material varnish onto a first area of ​​the image to generate a first varnish pattern; and spraying a second material varnish onto a second area of ​​the image to generate a second varnish pattern. While this patent achieves a similar purpose to the present invention, featuring the characteristic of forming a varnish pattern through inkjet printing and bonding it to a hot stamping film at a predetermined temperature to achieve localized hot stamping, the present invention places the localized hot stamping pattern in the middle layer of a fiberglass prepreg laminate structure and embeds it during hot pressing. Simultaneously, it transfers the inkjet pattern from the release film to the surface or bottom of the fiberglass board, and further constructs a primer and multi-layer surface decoration layers after molding. The comparative patent lacks or does not describe the combination of fiberglass prepreg laminate hot pressing and "built-in hot stamping layer + pattern transfer to fiberglass board". Summary of the Invention

[0006] To address the problems existing in the prior art, the present invention aims to provide a fiberglass board with inkjet printing patterns and partial hot stamping, and a method for preparing the same.

[0007] A fiberglass board with inkjet-printed patterns and partial hot stamping, and its preparation method, characterized by comprising the following steps: S1: Digitally print gradient colors or custom patterns on the OPP release film to obtain patterned film A; S2: Locally print cold foil stamping varnish on a preset area of ​​a 0.1mm ultra-strong transparent glass fiber semi-cured sheet to obtain varnish sheet B; S3: After aligning and bonding the hot stamping film with the varnish area of ​​the varnish film B and performing partial hot stamping, remove the hot stamping film to obtain hot stamping film C; S4: Using hot stamping sheet C as the middle layer and two layers of 0.1mm glass fiber semi-cured sheets as the stack, the pattern film A is placed on the top or bottom layer, hot-pressed, cooled and cured, and the release film is peeled off, so that the pattern is transferred to the surface or bottom and the hot stamping is embedded in the middle layer. S5: Apply an opaque primer to the bottom layer of the fiberglass substrate; S6: A transparent prime base coat, a transparent resin paint layer and its texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer and a hardening layer are sequentially formed on the side opposite to the primer, and a frosted texture is formed on the surface of the hardening layer.

[0008] Preferably, in step S1, the gradient color or custom pattern on the OPP release film is printed on the surface of the OPP release film according to a preset design scheme; In step S4, when the patterned film A is placed in the stacked structure, the printed surface of the OPP release film faces the adjacent glass fiber prepreg.

[0009] The above technical solution effectively fixes the two key aspects of pattern formation and layer placement. This invention clarifies the origin of the pattern film A. It also makes the bonding direction during layering more intuitive. Furthermore, this solution facilitates quick assessment by on-site personnel to determine if the placement is correct.

[0010] Specifically, the pre-designed scheme defines the pattern content and layout. The operator prints the pattern onto the OPP release film surface according to this scheme. This printing process forms pattern film A. Subsequently, when placing pattern film A in step S4, the operator ensures the printed surface faces the adjacent fiberglass prepreg. This orientation allows the printed layer to directly adhere to the resin interface of the prepreg. This interface withstands pressure and temperature during the hot-pressing stage. This interface also participates in the resin softening and curing process.

[0011] In practical applications, this solution is suitable for the stable production of gradient and custom patterns. It is also suitable for multiple batches of repetitive production. Production personnel can perform visual checks before lamination. Quality inspectors can also use orientation as a checkpoint. This solution can also reduce rework caused by incorrect assembly orientation. Furthermore, it facilitates the unified management of subsequent process parameters.

[0012] Preferably, the line accuracy formed by the partial printing of the cold foil stamping varnish in step S2 is 0.1mm, and the line width is not less than 0.1mm; The hot stamping film mentioned in step S3 is a regular hot stamping film or a hot stamping film with customized color and gloss.

[0013] The above technical solution allows for the precise definition of the minimum scale of local hot stamping patterns. This invention enables clearer boundaries for local hot stamping patterns. Furthermore, this invention allows different hot stamping film solutions to be implemented under the same process route. This solution also facilitates rapid switching between different appearance versions.

[0014] Specifically, in S2, the cold foil stamping varnish forms a partial pattern in a preset area. This partial pattern has a line precision of 0.1 mm. The partial pattern also has a line width of not less than 0.1 mm. This limitation provides a feasible lower geometric limit. In S3, the foil stamping film is aligned and bonded to the varnish area. This bonded area corresponds to the varnish pattern area. The foil stamping film is removed from the substrate after processing. This removal action preserves the corresponding foil stamping pattern.

[0015] In practical applications, this solution is suitable for fine lines, borders, characters, and logos. It is also suitable for highlighting metallic details. Production staff can choose standard hot stamping foil or custom colors and gloss levels. This choice only changes the material selection and does not alter the main process sequence. This solution also supports the production of multiple styles on the same line.

[0016] Preferably, in step S4, the temperature of hot pressing is 120℃-180℃, the pressure is 1MPa-5MPa, and the holding time is 10min-60min; the thickness of the fiberglass substrate formed after hot pressing is 0.3mm.

[0017] The above technical solution provides a conventional process window for hot pressing. This invention makes it easier to set hot pressing conditions. It also makes thickness control easier. This solution facilitates the establishment of stable production standards.

[0018] Specifically, S4 sets the temperature range to 120℃-180℃. S4 sets the pressure range to 1MPa-5MPa. S4 sets the holding time range to 10min-60min. These three parameters work together on the laminated structure. This laminated structure comprises three layers of 0.1mm fiberglass prepreg. The laminated structure also includes a patterned film A and an intermediate hot-stamping sheet C. The hot-pressing process applies heat and pressure to the laminate. The cooling and curing process completes the structural shaping. After this process, the fiberglass substrate thickness is 0.3mm.

[0019] In practical applications, this solution facilitates parameter matching within the same range across different equipment. Process engineers can select specific points within the range. They can also make fine adjustments based on the sheet metal dimensions. Quality inspectors can use a thickness of 0.3mm as a result inspection item. This solution also helps establish process consistency between batches. Furthermore, it facilitates the management of the hot-pressing stage as a critical control point.

[0020] Preferably, in step S4, the molding is performed by changing the structure of the hot pressing mold. The mold is a planar mold or a three-dimensional mold, so that the fiberglass substrate is a 2D planar fiberglass board or a 3D three-dimensional shaped fiberglass board. After step S4, an opaque primer is applied to the bottom layer of the fiberglass substrate, wherein the 2D planar fiberglass substrate is coated by printing and the 3D three-dimensional fiberglass substrate is coated by spraying.

[0021] The above technical solution integrates 2D and 3D molding into the same process framework. This invention allows for more precise mold selection. It also ensures that the primer application method corresponds to the molded shape. Furthermore, this solution facilitates product family expansion in factories.

[0022] Specifically, S4 allows for the replacement of the thermoforming mold structure. A planar mold corresponds to a 2D planar fiberglass board. A three-dimensional mold corresponds to a 3D three-dimensional fiberglass board. This limitation places the shape difference on the mold structure. Subsequently, S5 applies an opaque primer. The 2D planar fiberglass board is coated using a printing method. The 3D three-dimensional fiberglass board is coated using a spraying method. This correspondence links the coating method to the surface geometry.

[0023] In practical applications, this solution is suitable for simultaneously covering both planar and curved decorative parts. It is also suitable for the serialized development of electronic exterior components. Production personnel can first determine the mold type, and then select the primer coating process. This process facilitates branch management of work instructions. This solution can also reduce coating defects caused by mismatched process selection.

[0024] Preferably, a transparent prime base coat, a transparent resin paint layer and its texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer and a hardening layer are sequentially formed on the side opposite to the primer, and a frosted texture is formed on the surface of the hardening layer; wherein the spraying thickness of the transparent resin paint layer is 10–20 μm; the decorative effect layer is a semi-transparent layer or a pearlescent layer; and the hardening layer is formed by spraying a hardening resin spraying liquid.

[0025] The above technical solution allows for the fixation of the order of surface decorative layers. This invention can combine texture, gloss, and wear-resistant layers. It also provides material options for the decorative effect layer. Furthermore, this solution facilitates creating multiple versions of the same appearance on the same substrate.

[0026] Specifically, S6 first forms a transparent prime base coat. This base coat is located at the starting point of the surface decorative layer system. S6 then forms a transparent resin paint layer. The thickness of this transparent resin paint layer is 10–20 μm. S6 performs a printing process on the surface of this paint layer. This printing process forms a textured printing layer. S6 then performs PVD vacuum coating on the printed surface. This coating forms an optical brightening film layer. S6 then forms a decorative effect layer. This decorative effect layer is a translucent layer or a pearlescent layer. S6 finally sprays a hardening resin spray liquid to form a hardening layer. S6 then prints a frosted texture on the surface of the hardened layer.

[0027] In practical applications, this solution is suitable for creating decorative appearances that combine brightness and texture. It is also suitable for creating matte surfaces with a more pronounced tactile feel. Process engineers can change the texture by replacing the texture template. They can also change the appearance by changing the decorative effect layer material. This solution maintains the layer sequence. It keeps critical thicknesses and process points controllable. This solution also facilitates segmented inspection and rework control.

[0028] Preferably, the fiberglass board comprises: The fiberglass board substrate is formed by hot-pressing and bonding three layers of ultra-strong transparent fiberglass semi-cured sheets, each with a thickness of 0.1mm. The middle layer is the layer corresponding to hot stamping sheet C. Gradient colors or custom patterns located on the surface or bottom of the fiberglass substrate; An opaque primer layer located at the bottom layer of the fiberglass substrate; Located on the side opposite to the primer layer are a transparent prime base layer, a texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer, a hardening layer, and a frosted texture layer.

[0029] The above technical solution enables the creation of fiberglass board products with a clearly defined layered structure. This invention allows for the simultaneous presentation of patterns and partial hot stamping on the same board. Furthermore, the hot stamping layer can be positioned in the middle layer of the board. This solution also facilitates integration with subsequent surface coating systems.

[0030] Specifically, the product comprises a fiberglass substrate formed by hot-pressing three layers of 0.1mm ultra-strong transparent fiberglass prepreg. The middle layer of this fiberglass substrate corresponds to the layer of hot stamping foil C. The product also includes gradient colors or custom patterns on the surface or bottom. The product also includes an opaque primer layer at the bottom. The product also includes a prime base coat, a texture imprint layer, a PVD gloss enhancement film layer, a decorative effect layer, and a hardening layer on the other side. The product also includes a frosted texture layer on the surface of the hardening layer.

[0031] In practical applications, this product structure is suitable for components requiring decorative appearance. It is also suitable for components needing localized metallic accents. Production staff can change patterns within the same structural framework. They can also change the type of hot stamping foil within the same structural framework. This structure facilitates consistent appearance management. Furthermore, it makes it easier to designate key layers as inspection items.

[0032] Compared with the prior art, the present invention has the following advantages: 1. This invention first forms the inkjet printing pattern on a release film, then transfers it during the lamination and hot pressing process, while simultaneously placing localized hot-stamped graphics into the intermediate layer for further molding. This process links alignment, bonding, and molding together, making it easier for on-site personnel to verify the placement direction and area location, ensuring consistency between the pattern and the hot-stamped boundary, facilitating smoother transitions in subsequent processes, and reducing the probability of rework.

[0033] 2. This invention combines the primer, base coat, texture imprint, gloss enhancement film, decorative effect layer, and hardened matte layer in a sequential manner. The layering relationship is clear, and there is a wider range of material choices. Process engineers can adjust the surface appearance and feel without changing the previous layer structure, making product version switching more convenient, the verification path clearer, and facilitating segmented inspection and problem localization, as well as maintaining process stability. Attached Figure Description

[0034] Figure 1 This is a schematic flowchart of the present invention. Detailed Implementation

[0035] 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.

[0036] The present invention will be described in detail below through multiple embodiments and comparative examples. These embodiments are intended to further illustrate the technical solutions and beneficial effects of the present invention, and are not intended to limit the scope of protection of the present invention. Unless otherwise specified, all parts mentioned in the present invention are parts by weight, and the process equipment mentioned is conventional equipment in the art.

[0037] This invention provides a fiberglass board with inkjet-printed patterns and partial hot stamping, and a method for preparing the same. The method is implemented according to steps S1 to S6. Operators typically first prepare a pattern film A and a hot stamping sheet C, then perform lamination and hot pressing to obtain the fiberglass board substrate, subsequently forming a primer layer and a surface decorative layer system.

[0038] S1: The operator provides the OPP release film. The operator determines the gradient colors or customized pattern according to the preset design scheme. The operator performs digital printing on the surface of the OPP release film to obtain pattern film A. The operator can visually inspect pattern film A, checking the pattern orientation, edge integrity, and any obvious defects.

[0039] S2: The operator provides a 0.1mm thick ultra-strong transparent fiberglass prepreg. The operator applies cold foil stamping varnish to a pre-defined hot stamping area, resulting in varnish sheet B. The operator can verify the position and shape of the varnished area. The operator can also verify that the line accuracy and line width meet the process requirements.

[0040] S3: The operator provides the hot stamping foil. The operator aligns and applies the hot stamping foil to the varnish area of ​​the varnish sheet B. The operator performs localized hot stamping. After processing, the operator removes the hot stamping foil, obtaining hot stamping sheet C. The operator can then visually inspect the hot stamping pattern. The operator can verify that the hot stamping area corresponds to the varnish area. The operator can choose standard hot stamping foil or a custom-colored, high-gloss hot stamping foil according to the product's appearance requirements.

[0041] S4: The operator selects three layers of ultra-strong transparent fiberglass prepreg, each 0.1mm thick, for lamination. The operator sets the hot stamping sheet C as the middle layer. The operator uses the other two layers as the outer layers. The operator places the pattern film A on the top or bottom layer of the laminated structure. When placing the pattern film A, the operator ensures that the printed side of the OPP release film faces the adjacent fiberglass prepreg. The operator places the laminated structure into a hot press for hot pressing and then cools and cures it to form a fiberglass board substrate. The operator peels off the OPP release film after hot pressing. The operator can confirm the position of the pattern after peeling. The operator can confirm the hot stamping position of the middle layer. The operator can process 2D planar or 3D three-dimensional shapes by changing the hot pressing mold structure.

[0042] S5: The operator applies an opaque primer to the fiberglass substrate. In 2D processes, the operator uses a printing method for application. In 3D processes, the operator uses a spraying method for application. The operator can inspect the primer coverage.

[0043] S6: The operator sequentially forms the following layers on the side opposite the primer: a transparent prime base coat, a transparent resin paint layer and its texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer, and a hardening layer. The operator then applies a frosted texture to the hardening layer. Depending on the desired appearance, the operator can choose between a semi-transparent or pearlescent layer for the decorative effect layer. The operator can perform a routine visual inspection after each layer is formed.

[0044] Example 1 This embodiment provides a method for preparing a 2D planar fiberglass board. The operator uses a planar hot-pressing mold in this embodiment. The operator sets the pattern on the surface of the finished product. A semi-transparent layer is selected as the decorative layer in this embodiment.

[0045] S1: The operator provides the OPP release film. The operator selects a gradient pattern according to the preset design scheme. The operator digitally prints the pattern onto the release film surface to obtain pattern film A. The operator checks pattern film A before lamination. The operator checks the orientation and position markings of the pattern. The operator can also check whether there are obvious broken lines or missing ink at the edges of the pattern.

[0046] S2: The operator provides a 0.1mm ultra-strong transparent fiberglass prepreg. The operator applies cold foil stamping varnish to a pre-defined hot stamping area, resulting in varnish sheet B. The operator can then verify the outline of the varnished area. The operator can also verify the line accuracy and line width.

[0047] S3: The operator provides standard hot stamping film. The operator aligns and attaches the hot stamping film to the varnish area of ​​varnish sheet B. The operator performs localized hot stamping. After processing, the operator removes the hot stamping film, obtaining hot stamping sheet C. The operator can check whether the hot stamping pattern matches the preset area. The operator can check whether there is any obvious offset at the boundary.

[0048] S4: The operator prepares three layers of 0.1mm ultra-strong transparent fiberglass prepreg. The operator places the hot stamping sheet C as the middle layer. The operator places the pattern film A on the top layer of the laminate. When placing the pattern film A, the operator ensures the printed side faces the adjacent prepreg. The operator places the laminate into a hot press and performs hot pressing and cooling curing to form the fiberglass substrate. After hot pressing, the operator peels off the OPP release film. The operator can confirm that the pattern is located on the surface side of the fiberglass substrate. The operator can confirm that the hot stamping pattern is located in the middle layer position.

[0049] S5: The operator applies an opaque primer to the bottom layer of the fiberglass board substrate using a printing method. After application, the operator can check the uniformity of coverage. The operator can also record the primer color batch information for traceability.

[0050] S6: The operator first forms a transparent prime base coat on the non-primer side. Then, the operator forms a transparent resin paint layer and performs texture imprinting on its surface to form a texture imprint layer. The operator then performs PVD vacuum deposition on the texture imprint layer to form an optical brightening film. The operator forms a translucent layer on the optical brightening film as a decorative effect layer. Finally, the operator forms a hardening layer and creates a frosted texture on its surface. The operator can then check the consistency of the final surface texture.

[0051] Example 2 This embodiment provides a method for preparing a 3D stereoscopic fiberglass board. The operator uses a stereoscopic hot-pressing mold in this embodiment. The operator places the pattern on the bottom side of the finished product. The operator selects a pearlescent layer as the decorative effect layer in this embodiment.

[0052] S1: The operator provides the OPP release film. The operator selects a customized pattern according to the preset design scheme. The operator digitally prints the pattern onto the release film surface to obtain pattern film A. The operator checks the pattern orientation before lamination. The operator can verify the correspondence between the pattern and the product shape.

[0053] S2: The operator provides a 0.1mm ultra-strong transparent fiberglass prepreg. The operator applies cold foil stamping varnish to a pre-defined hot stamping area, resulting in varnish sheet B. The operator can verify the consistency between the varnished area and the subsequent hot stamping area. The operator can also verify the line width requirements.

[0054] S3: The operator provides a hot stamping film with a customized color or gloss. The operator aligns and applies the hot stamping film to the varnish area of ​​varnish sheet B. The operator performs spot hot stamping. After processing, the operator removes the hot stamping film, obtaining hot stamping sheet C. The operator can check the continuity of the hot stamping pattern at key corners or fine lines.

[0055] S4: The operator prepares three layers of 0.1mm ultra-strong transparent fiberglass prepreg. The operator places the hot stamping sheet C as the middle layer. The operator places the pattern film A as the bottom layer of the stacked structure. When placing the pattern film A, the operator ensures the printed side faces the adjacent prepreg. The operator places the stacked structure into the 3D mold and hot-presses it, then cools and cures it to form the fiberglass substrate. After hot pressing, the operator peels off the OPP release film. The operator can confirm that the pattern is located on the bottom side of the fiberglass substrate. The operator can confirm that the hot stamping pattern is located in the middle layer. The operator can verify the relative positions of the patterns on key parts of the 3D shape.

[0056] S5: The operator applies an opaque primer to the bottom layer of the 3D-shaped fiberglass board substrate using a spraying method. The operator can check the coverage at curved surfaces and corners.

[0057] S6: The operator first forms a transparent prime base coat on the non-primer side. Then, the operator forms a transparent resin paint layer and performs texture imprinting to form a texture imprint layer. The operator then applies PVD vacuum coating to the texture imprint layer to form an optical brightening film. The operator then forms a pearlescent layer on the optical brightening film as a decorative effect layer. Finally, the operator forms a hardening layer and creates a frosted texture on its surface. The operator can then verify the final appearance consistency.

[0058] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A fiberglass board with inkjet-printed patterns and partial hot stamping, and its preparation method, characterized in that, Includes the following steps: S1: Digitally print gradient colors or custom patterns on the OPP release film to obtain patterned film A; S2: Locally print cold foil stamping varnish on a preset area of ​​a 0.1mm ultra-strong transparent glass fiber semi-cured sheet to obtain varnish sheet B; S3: After aligning and bonding the hot stamping film with the varnish area of ​​the varnish film B and performing partial hot stamping, remove the hot stamping film to obtain hot stamping film C; S4: Using hot stamping sheet C as the middle layer and two layers of 0.1mm glass fiber semi-cured sheets as the stack, the pattern film A is placed on the top or bottom layer, hot-pressed, cooled and cured, and the release film is peeled off, so that the pattern is transferred to the surface or bottom and the hot stamping is embedded in the middle layer. S5: Apply an opaque primer to the bottom layer of the fiberglass substrate; S6: A transparent prime base coat, a transparent resin paint layer and its texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer and a hardening layer are sequentially formed on the side opposite to the primer, and a frosted texture is formed on the surface of the hardening layer.

2. The method according to claim 1, characterized in that: In step S1, the gradient color or custom pattern on the OPP release film is printed on the surface of the OPP release film according to a preset design scheme; In step S4, when the patterned film A is placed in the stacked structure, the printed surface of the OPP release film faces the adjacent glass fiber prepreg.

3. The method according to claim 1, characterized in that: The line accuracy formed by the partial printing of the cold foil stamping gold varnish in step S2 is 0.1mm, and the line width is not less than 0.1mm; The hot stamping film mentioned in step S3 is a regular hot stamping film or a hot stamping film with customized color and gloss.

4. The method according to claim 1, characterized in that: The temperature of hot pressing in step S4 is 120℃-180℃, the pressure is 1MPa-5MPa, and the holding time is 10min-60min; the thickness of the fiberglass substrate formed after hot pressing is 0.3mm.

5. The method according to claim 1, characterized in that: In step S4, the molding process is carried out by changing the structure of the hot pressing mold. The mold is either a planar mold or a three-dimensional mold, so that the fiberglass substrate is a 2D planar fiberglass board or a 3D three-dimensional shaped fiberglass board. After step S4, an opaque primer is applied to the bottom layer of the fiberglass substrate, wherein the 2D planar fiberglass board is coated by printing and the 3D three-dimensional fiberglass board is coated by spraying.

6. The method according to claim 5, characterized in that: A transparent prime base coat, a transparent resin paint layer and its texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer and a hardening layer are sequentially formed on the side opposite to the primer, and a frosted texture is formed on the surface of the hardening layer; wherein the spraying thickness of the transparent resin paint layer is 10–20 μm; the decorative effect layer is a semi-transparent layer or a pearlescent layer; the hardening layer is formed by spraying a hardening resin spraying liquid.

7. A fiberglass board, characterized in that, The fiberglass board is prepared by the method according to any one of claims 1 to 6, wherein the fiberglass board comprises: The fiberglass board substrate is formed by hot-pressing and bonding three layers of ultra-strong transparent fiberglass semi-cured sheets, each with a thickness of 0.1mm. The middle layer is the layer corresponding to hot stamping sheet C. Gradient colors or custom patterns located on the surface or bottom of the fiberglass substrate; An opaque primer layer located at the bottom layer of the fiberglass substrate; Located on the side opposite to the primer layer are a transparent prime base layer, a texture imprint layer, a PVD vacuum-deposited optical brightening film layer, a decorative effect layer, a hardening layer, and a frosted texture layer.

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