Glass fiber reinforced plastic panel not easy to crack and processing method thereof

Abstract

The invention discloses a glass fiber reinforced plastic panel not easy to crack and a processing method thereof, and relates to the technical field of glass fiber reinforced plastic plates. A glass fiber reinforced plastic panel not prone to cracking comprises a fiber reinforced matrix layer and a gel coat layer, the gel coat layer is arranged on at least one surface of the fiber reinforced matrix layer, the width of the fiber reinforced matrix layer is larger than that of the gel coat layer, and the width of the gel coat layer is larger than that of the fiber reinforced matrix layer. And the edge of the glass fiber reinforced plastic panel is only provided with the fiber reinforced matrix layer and does not cover the gel coat layer. According to the glass fiber reinforced plastic panel not prone to cracking, the probability that the gel coat layer of the glass fiber reinforced plastic panel cracks especially under the bending stress condition is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of glass fiber reinforced plastic plates, and in particular to a glass fiber reinforced plastic panel that is not prone to cracking and a processing method thereof. Background Art

[0002] FRP is a reinforced plastic with epoxy resin, reinforced unsaturated polyester, phenolic resin as the matrix and glass fiber or its products as the reinforcing material. FRP has the characteristics of light weight, hardness, non-conductivity and corrosion resistance.

[0003] FRP panels are made of new fiber products such as glass fiber yarn, glass fiber mat, mesh cloth and various resins through extrusion, molding, hand lay-up and other production processes. As a new type of composite material, FRP panels made of FRP are widely used in home appliance manufacturing, shipbuilding, automobiles, manufacturing parts and glass fiber reinforced plastics.

[0004] FRP panels are generally composed of an inner fiber-reinforced matrix layer and an outer gel coat layer. The outer gel coat layer is mainly made of gel coat resin or unsaturated resin. The resin is very brittle after molding, so during processing and use, especially under bending stress conditions, the outer gel coat layer is prone to cracks. Summary of the invention

[0005] In order to reduce the probability of cracks in the gel coat layer of the FRP panel, especially under bending stress conditions, the present application provides a FRP panel that is not prone to cracking and a processing method thereof.

[0006] The present application provides a fiberglass panel that is not easy to crack and a processing method thereof, which adopts the following technical solutions: In a first aspect, the present application provides a fiberglass panel that is not prone to cracking, comprising a fiber-reinforced matrix layer and a gel coat layer, wherein the gel coat layer is arranged on at least one surface of the fiber-reinforced matrix layer, the width of the fiber-reinforced matrix layer is greater than the width of the gel coat layer, and the edge of the fiberglass panel is only covered by the fiber-reinforced matrix layer but not by the gel coat layer.

[0007] By adopting the above technical solution, the main raw material of the gel coat layer is thermosetting resin, so the gel coat layer is relatively brittle. When subjected to bending stress, the gel coat layer of the FRP panel is prone to cracking, and the cracking generally starts from the very edge.

[0008] The edge of the fiberglass panel of the present application is not covered with a gel coat layer, but only with a fiber-reinforced base layer. The base layer reinforced with glass fibers has excellent anti-cracking performance, and the glass fibers can also hinder the further extension of cracks, thereby increasing the probability of cracks forming on the glass panel when subjected to bending stress.

[0009] When the fiberglass panels are in use, the edges are often at the structural splicing position, and the edges of the final product will not be exposed. Therefore, even if there is only a fiber-reinforced matrix layer at the edge, the aesthetics, wear resistance, etc. can still meet the requirements.

[0010] Optionally, the width of the edge of the fiberglass reinforced plastic panel not covering the gel coat layer is 1-100 mm.

[0011] By adopting the above technical solution, the fiber-reinforced matrix layer with an edge width of 1mm can also play an anti-cracking effect. The fiber-reinforced collective layer has a smooth cut surface during the trimming process with a trimming knife to determine the width, and it is not easy to produce microscopic serrations like the gel coat layer. The edge is not easy to crack due to serration damage when bent.

[0012] Optionally, the fiber-reinforced matrix layer comprises the following raw materials in parts by weight: 40-58 parts of the first unsaturated polyester resin; Epoxy acrylic resin 12-25 parts; Glass fiber 20-55 parts; Accelerator 0.2-1.5 parts; 1.5-3.2 parts of the first curing agent; 8-20 parts of hollow glass microspheres; Expanded graphite 4-7 parts; Defoaming agent 0.5-2.5 parts; Leveling agent 0.5-2.5 parts; 0.5-2 parts of inhibitor; 5-14 parts of functional materials; 1-15 parts of low shrinkage agent.

[0013] By adopting the above technical solution, hollow glass microspheres have the characteristics of absorbing ultraviolet rays and heat insulation, and expanded graphite has good flame retardancy and corrosion resistance. Adding hollow glass microspheres and expanded graphite to the fiber matrix reinforcement layer and matching functional materials as fillers can enhance the strength of the FRP panel and improve the heat insulation and flame retardancy of the FRP panel. Epoxy acrylic resin and first unsaturated polyester resin are selected as the resin of the matrix layer, and cross-linked with a low shrinkage agent to form a three-dimensional network, so that the toughness and tensile properties of the FRP panel are more excellent. By compounding various components, a FRP panel with good strength, tensile properties and crack resistance is obtained.

[0014] Optionally, the gel coat layer comprises the following raw materials in parts by weight: 60-80 parts of the second unsaturated polyester resin; 5-13 parts of quartz sand; Accelerator 0.2-1.5 parts; 1.5-3.2 parts of the second curing agent; 5-35 parts of titanium dioxide; Leveling agent 0.5-2.5 parts; Defoaming agent 0.5-2.5 parts; 0.5-2 parts of inhibitor; 3-35 parts of low shrinkage agent; Anti-ultraviolet agent 0.02-0.1 parts.

[0015] By adopting the above technical solution and selecting titanium dioxide as filler, the weight of the FRP panel can be effectively reduced while maintaining strength. The addition of quartz sand can effectively improve the wear resistance and hardness of the gel coat layer and enhance the protection of the gel coat layer to the substrate layer.

[0016] Optionally, the accelerator is a cobalt-based accelerator, the first curing agent and the second curing agent are one or more of dibenzoyl peroxide, methyl ethyl ketone peroxide, tert-butyl hydroperoxide, and isopropylbenzene hydroperoxide, and the low shrinkage agent is one or more of polyethylene, polystyrene, polyvinyl acetate, polyvinyl acetate and polymethyl methacrylate block copolymer, and polyvinyl acetate and polystyrene block copolymer.

[0017] Optionally, the glass fiber is a combination of one or more of fiber mat and fiber yarn, fiber mat, fiber cloth, stitched mat, and composite mat.

[0018] By adopting the above technical solution, the selection of glass fiber makes the fiber content of FRP panel high, with excellent mechanical properties, high tensile strength and good impact resistance. The surface of fiber mat is delicate and has little effect on the aesthetics of FRP panel. The combination of fiber mat and other forms can maintain the aesthetics on the basis of strengthening FRP panel.

[0019] Optionally, the functional material is one or more of aluminum hydroxide, talc, kaolin, and calcium carbonate.

[0020] In a second aspect, the present application provides a method for processing a fiberglass panel that is not prone to cracking, comprising the following steps: S1. preparing a gel coat layer raw material to obtain a gel coat layer coating, coating the gel coat layer coating on a PET film of a certain thickness, pulling the PET film under the traction of a power roller to heat the gel coat coating through an oven to obtain a semi-cured gel coat initial layer, touching the surface of the gel coat initial layer with a finger, and feeling that the surface of the gel coat initial layer touched by the finger is sticky, but the gel coat does not stick to the finger; S2. The fiber-reinforced substrate layer is prepared by removing the raw materials other than the glass fiber to obtain a substrate layer coating, and the substrate layer coating is applied to the initial gel coat layer; S3. Lay the glass fiber flat on the base layer of coating, and fully infiltrate the base layer of coating with the glass fiber under the action of the impregnation roller; S4. After the thickness is set by the thickness setting roller, a PET film of a certain thickness is attached to the surface of the base layer; S5. Under the synchronous traction of the power roller, the fiberboard with the cover film is heated and cured in a curing oven; S6. Cutting, rolling and packaging are performed under the synchronous traction of the power roller to obtain the fiberglass reinforced plastic panel.

[0021] By adopting the above technical solution, the initial gel coat layer is prepared first, and then the base layer coating is applied after the initial gel coat layer is semi-cured, and finally the glass fiber is impregnated, and the preparation process is simple.

[0022] Optionally, in step S2, when the base layer coating is applied to the initial gel coat layer, the width of the base layer coating is greater than the width of the initial gel coat layer, and after being integrated, the edge of the fiber-reinforced base layer is not covered by the gel coat layer; Alternatively, the width of the base layer coating is equal to the width of the initial gel coat layer. After being integrated and cured by heating, the gel coat layer covering the edge of the fiber-reinforced base layer is removed by grinding.

[0023] By adopting the above technical solution, the above method can achieve the purpose of not covering the edge of the fiberglass reinforced plastic panel with a gel coat layer but only with a fiber reinforced matrix layer.

[0024] In summary, this application has the following beneficial effects: 1. The main raw material of the gel coat layer is thermosetting resin, so the gel coat layer is relatively brittle. When subjected to bending stress, the gel coat layer of the FRP panel is prone to cracking, and the cracking generally starts from the edge.

[0025] The edge of the fiberglass panel of the present application is not covered with a gel coat layer, but only with a fiber-reinforced base layer. The base layer reinforced with glass fibers has excellent anti-cracking performance, and the glass fibers can also hinder the further extension of cracks, thereby increasing the probability of cracks forming on the glass panel when subjected to bending stress.

[0026] When the fiberglass panels are in use, the edges are often at the structural splicing position, and the edges of the final product will not be exposed. Therefore, even if there is only a fiber-reinforced matrix layer at the edge, the aesthetics, wear resistance, etc. can still meet the requirements.

[0027] 2. The fiber-reinforced matrix layer with an edge width of 1mm can also play an anti-cracking role. The fiber-reinforced collective layer has a smooth cut surface during the trimming process with a trimming knife to determine the width. It is not easy to produce microscopic serrations like the gel coat layer, and the edge is not easy to crack due to serration damage when bent. DETAILED DESCRIPTION

[0028] The present application is further described in detail below in conjunction with Examples 1-3.

[0029] Example 1 The present embodiment provides a fiberglass panel that is not prone to cracking, specifically comprising a fiber reinforced matrix layer and a gel coat layer, wherein the gel coat layer is disposed on the upper surface of the fiber reinforced matrix layer. The width of the fiber reinforced matrix layer is greater than the width of the gel coat layer, and the edge of the fiberglass panel is not covered with the gel coat layer, and the width of the edge not covered with the gel coat layer is 1 mm.

[0030] After research, the inventors found that the gel coat layer is prone to cracking when subjected to bending stress, while the fiber-reinforced matrix layer is not prone to cracking. Furthermore, the inventors also found that the cracking of the gel coat layer of the FRP panel generally starts from the very edge and gradually extends inward. In the usage scenario (for example, for the surface of the compartment such as RV), the edge of the FRP panel is often in the structural splicing position. The edge of the FRP panel will not be exposed in the final product, and the requirements for aesthetics, weather resistance, corrosion resistance and wear resistance are also relatively low.

[0031] By adopting a gel coat-free design on the edge of the FRP sheet, the fiber-reinforced matrix layer on the edge can play a role in resisting cracking, and the aesthetics, weather resistance, corrosion resistance and wear resistance can also meet the requirements. Most of the gel coat cracking is caused by the cutter micro-cutting the gel coat surface of the sheet into small serrations during edge trimming. The fiber-reinforced matrix layer is not easy to form micro-serrations on the edge of the fiber-reinforced matrix layer during the trimming process of the trimming knife to determine the width. The cut surface is smooth and neat at the micro level. When bending, the edge of the fiber-reinforced matrix layer is not damaged by the trimming knife, and it will not extend along the damaged surface to cause cracking. At the same time, even if the edge of the fiber-reinforced matrix layer is damaged, there is a tendency for the bending to extend and crack along the damaged surface of the fiber-reinforced matrix layer, but the introduction of glass fiber inside will also prevent the further extension of the crack.

[0032] In this embodiment, the fiber-reinforced matrix layer includes the following raw materials in parts by weight: 40 parts of the first unsaturated polyester resin; Epoxy acrylic resin 12 parts; 30 parts of glass fiber, specifically a combination of 1 part of fiber mat and 29 parts of fiber mat; 0.3 parts of accelerator, specifically cobalt isooctanoate; 2 parts of the first curing agent, specifically methyl ethyl ketone peroxide; 8 parts of hollow glass microspheres, with an average particle size of 80 μm; 4 parts of expanded graphite; 0.5 parts of defoaming agent; 0.5 parts of leveling agent; 0.5 part of inhibitor; 5 parts of functional material, specifically aluminum hydroxide; 3 parts of low shrinkage agent.

[0033] The base layer coating of the fiber-reinforced base layer is prepared by the following steps: The first unsaturated polyester resin, epoxy acrylic resin, accelerator, first curing agent, hollow glass microspheres, expanded graphite, defoamer, leveling agent, inhibitor and low shrinkage agent are added into a stirring tank according to weight ratio and mixed in the stirring tank to obtain a base layer coating.

[0034] The gel coat layer includes the following raw materials in parts by weight: 60 parts of the second unsaturated polyester resin; 5 parts of quartz sand; 2 parts of the second curing agent, specifically methyl ethyl ketone peroxide; 25 parts of titanium dioxide; 0.5 parts of accelerator, specifically cobalt isooctanoate; 0.5 parts of leveling agent; 0.5 parts of defoaming agent; 0.5 part of inhibitor; 25 parts of low shrinkage agent; 0.02 parts of UV protection agent.

[0035] The gel coat coating is prepared by the following steps: The second unsaturated polyester resin, quartz sand, accelerator, second curing agent, titanium dioxide, leveling agent, defoamer, polymerization inhibitor, low shrinkage agent and anti-ultraviolet agent are put into a stirring tank according to weight ratio and mixed evenly to obtain a gel coat coating.

[0036] A method for processing a fiberglass panel that is not prone to cracking, comprising the following steps: S1. preparing a gel coat layer raw material to obtain a gel coat layer coating, coating the gel coat layer coating on a PET film of a certain thickness, pulling the PET film under the traction of a power roller to heat the gel coat coating through an oven to obtain a semi-cured gel coat initial layer, touching the surface of the gel coat initial layer with a finger, and feeling that the surface of the gel coat initial layer touched by the finger is sticky, but the gel coat does not stick to the finger; S2. preparing a base layer coating by removing the raw materials of the fiber-reinforced base layer except the glass fiber, and applying the base layer coating to the initial gel coat layer, wherein the width of the base layer coating is greater than the width of the initial gel coat layer, and the edge of the fiber-reinforced base layer is not covered with the gel coat layer after the integration; S3. Lay the glass fiber flat on the base layer coating, and fully infiltrate the base layer coating with the glass fiber under the action of the impregnation roller; S4. After the thickness is set by the thickness setting roller, a PET film of a certain thickness is attached to the surface of the base layer; S5. Under the synchronous traction of the power roller, the fiberboard with the cover film is heated and cured in a curing oven; S6. Cutting, rolling and packaging are performed under the synchronous traction of the power roller to obtain the fiberglass reinforced plastic panel.

[0037] Example 2 The present embodiment provides a fiberglass panel that is not prone to cracking, specifically comprising a fiber reinforced matrix layer and a gel coat layer, wherein the gel coat layer is disposed on the lower surface of the fiber reinforced matrix layer. The width of the fiber reinforced matrix layer is greater than the width of the gel coat layer, and the edge of the fiberglass panel is not covered with the gel coat layer, and the width of the edge not covered with the gel coat layer is 100 mm.

[0038] In this embodiment, the fiber-reinforced matrix layer includes the following raw materials in parts by weight: 58 parts of the first unsaturated polyester resin; Epoxy acrylic resin 25 parts; 24 parts of glass fiber, specifically a combination of 1 part of fiber mat, 14 parts of fiber mat and 9 parts of fiber cloth; 0.9 parts of accelerator, specifically cobalt naphthenate; 2.2 parts of the first curing agent, specifically tert-butyl hydroperoxide; 20 parts of hollow glass microspheres, with an average particle size of 80 μm; Expanded graphite 7 parts; 2.5 parts of defoaming agent; 2.5 parts of leveling agent; 2 parts of inhibitor; 14 parts of functional materials, specifically 8 parts of kaolin and 6 parts of talc; 1 part of low shrinkage agent.

[0039] The base layer coating of the fiber-reinforced base layer is prepared by the following steps: The first unsaturated polyester resin, epoxy acrylic resin, accelerator, first curing agent, hollow glass microspheres, expanded graphite, defoamer, leveling agent, inhibitor and low shrinkage agent are added into a stirring tank according to weight ratio and mixed in the stirring tank to obtain a base layer coating.

[0040] The gel coat layer includes the following raw materials in parts by weight: 80 parts of the second unsaturated polyester resin; 13 parts of quartz sand; 1.1 parts of accelerator, specifically cobalt isooctanoate; 2.5 parts of a second curing agent, specifically cumene hydroperoxide; Titanium dioxide 10 parts; 2.5 parts of leveling agent; 2.5 parts of defoaming agent; 2 parts of inhibitor; 28 parts of low shrinkage agent; 0.1 part of UV protection agent.

[0041] The gel coat coating is prepared by the following steps: The second unsaturated polyester resin, quartz sand, accelerator, second curing agent, titanium dioxide, leveling agent, defoamer, polymerization inhibitor, low shrinkage agent and anti-ultraviolet agent are put into a stirring tank according to weight ratio and mixed evenly to obtain a gel coat coating.

[0042] A method for processing a fiberglass panel that is not prone to cracking, comprising the following steps: S1. preparing a gel coat layer raw material to obtain a gel coat layer coating, coating the gel coat layer coating on a PET film of a certain thickness, pulling the PET film under the traction of a power roller to heat the gel coat coating through an oven to obtain a semi-cured gel coat initial layer, touching the surface of the gel coat initial layer with a finger, and feeling that the surface of the gel coat initial layer touched by the finger is sticky, but the gel coat does not stick to the finger; S2. preparing a base layer coating by removing the raw materials of the fiber-reinforced base layer except for the glass fiber, applying the base layer coating to the initial gel coat layer, the width of the base layer coating being equal to the width of the initial gel coat layer, and removing the gel coat layer covering the edge of the fiber-reinforced base layer by grinding after the two layers are integrated and heated and cured; S3. Lay the glass fiber flat on the base layer coating, and fully infiltrate the base layer coating with the glass fiber under the action of the impregnation roller; S4. After the thickness is set by the thickness setting roller, a PET film of a certain thickness is attached to the surface of the base layer; S5. Under the synchronous traction of the power roller, the fiberboard with the cover film is heated and cured in a curing oven; S6. Cutting, rolling and packaging are performed under the synchronous traction of the power roller to obtain the fiberglass reinforced plastic panel.

[0043] Example 3 The present embodiment provides a fiberglass panel that is not prone to cracking, specifically comprising a fiber reinforced matrix layer and a gel coat layer, wherein the gel coat layer is disposed on the upper surface of the fiber reinforced matrix layer. The width of the fiber reinforced matrix layer is greater than the width of the gel coat layer, and the edge of the fiberglass panel is not covered with the gel coat layer, and the width of the edge not covered with the gel coat layer is 50 mm.

[0044] In this embodiment, the fiber-reinforced matrix layer includes the following raw materials in parts by weight: 50 parts of the first unsaturated polyester resin; Epoxy acrylic resin 19 parts; 26 parts of glass fiber, specifically a combination of 1 part of fiber mat and 25 parts of composite mat; 1.4 parts of accelerator, specifically cobalt isooctanoate; 2.5 parts of a first curing agent, specifically dibenzoyl peroxide; 15 parts of hollow glass microspheres, with an average particle size of 80 μm; 5 parts of expanded graphite; 1.5 parts of defoaming agent; 2 parts of leveling agent; 1 part of inhibitor; 9 parts of functional materials, specifically calcium carbonate; 2 parts of low shrinkage agent.

[0045] The base layer coating of the fiber-reinforced base layer is prepared by the following steps: The first unsaturated polyester resin, epoxy acrylic resin, accelerator, first curing agent, hollow glass microspheres, expanded graphite, defoamer, leveling agent, inhibitor and low shrinkage agent are added into a stirring tank according to weight ratio and mixed in the stirring tank to obtain a base layer coating.

[0046] The gel coat layer includes the following raw materials in parts by weight: 72 parts of the second unsaturated polyester resin; 10 parts of quartz sand; 2 parts of accelerator, specifically cobalt naphthenate; 3 parts of the second curing agent, specifically methyl ethyl ketone peroxide; 15 parts of titanium dioxide; 1.8 parts of leveling agent; 1.2 parts of defoaming agent; 1.5 parts of inhibitor; 33 parts of low shrinkage agent; 0.06 parts of UV protection agent.

[0047] The gel coat coating is prepared by the following steps: The second unsaturated polyester resin, quartz sand, accelerator, second curing agent, titanium dioxide, leveling agent, defoamer, polymerization inhibitor, low shrinkage agent and anti-ultraviolet agent are put into a stirring tank according to weight ratio and mixed evenly to obtain a gel coat coating.

[0048] The method for processing the fiberglass panel that is not prone to cracking is the same as the steps in Example 1.

[0049] The tensile strength and impact strength of the glass fiber reinforced plastic panels prepared in Examples 1-3 were tested. Sample Tensile strength(MPa) <![CDATA[Impact strength (KJ / m 2 )]]> Example 1 105 33 Example 2 127 45 Example 3 122 43

[0050] According to the table, the tensile strength of the glass fiber reinforced plastic panel prepared according to the preparation method and raw materials of this application is greater than 100MPa, and the impact strength is greater than 30KJ / m 2, has good mechanical strength and tensile properties, as well as excellent crack resistance, meeting the requirements of use.

[0051] In Examples 1-3, the glass fibers of the fiber-reinforced matrix layer are respectively made of different raw material combinations. Example 1 uses a combination of fiber mat and fiber mat, Example 2 uses a combination of fiber mat, fiber mat and fiber cloth, and Example 3 uses a combination of fiber mat and composite mat. Due to the difference in strength of fiber mat, fiber cloth and composite mat, the tensile strength of the fiberglass panels of Examples 1-3 is different, but all meet the use requirements.

[0052] This specific implementation manner is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make non-creative modifications to the specific implementation manner as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present application.

Claims

1. A fiberglass panel that is not easy to crack, comprising a fiber-reinforced matrix layer and a gel coat layer, characterized in that: The gel coat layer is disposed on at least one surface of the fiber reinforced matrix layer, the fiber reinforced matrix layer has a width greater than that of the gel coat layer, and the edge of the fiber reinforced plastic panel is only covered by the fiber reinforced matrix layer but not by the gel coat layer.

2. The non-cracking fiberglass panel according to claim 1, characterized in that: The width of the edge of the fiberglass reinforced plastic panel not covering the gel coat layer is 1-100 mm.

3. The non-cracking fiberglass panel according to claim 1, characterized in that: The fiber-reinforced matrix layer comprises the following raw materials in parts by weight: 40-58 parts of the first unsaturated polyester resin; Epoxy acrylic resin 12-25 parts; Glass fiber 20-55 parts; Accelerator 0.2-1.5 parts; 1.5-3.2 parts of the first curing agent; 8-20 parts of hollow glass microspheres; Expanded graphite 4-7 parts; Defoaming agent 0.5-2.5 parts; Leveling agent 0.5-2.5 parts; 0.5-2 parts of inhibitor; 5-14 parts of functional materials; 1-15 parts of low shrinkage agent.

4. The non-cracking glass fiber reinforced plastic panel according to claim 3, characterized in that: The gel coat layer comprises the following raw materials in parts by weight: 60-80 parts of the second unsaturated polyester resin; 5-13 parts of quartz sand; Accelerator 0.2-1.5 parts; 1.5-3.2 parts of the second curing agent; 5-35 parts of titanium dioxide; Leveling agent 0.5-2.5 parts; Defoaming agent 0.5-2.5 parts; 0.5-2 parts of inhibitor; 3-35 parts of low shrinkage agent; Anti-ultraviolet agent 0.02-0.1 parts.

5. The non-cracking glass fiber reinforced plastic panel according to claim 4, characterized in that: The accelerator is a cobalt-based accelerator, the first curing agent and the second curing agent are one or more of dibenzoyl peroxide, methyl ethyl ketone peroxide, tert-butyl hydroperoxide, and isopropylbenzene hydroperoxide, and the low shrinkage agent is one or more of polyethylene, polystyrene, polyvinyl acetate, polyvinyl acetate and polymethyl methacrylate block copolymer, and polyvinyl acetate and polystyrene block copolymer.

6. The non-cracking glass fiber reinforced plastic panel according to claim 3, characterized in that: The functional material is one or more of aluminum hydroxide, talc, kaolin and calcium carbonate.

7. A method for processing a non-cracking FRP panel according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1. preparing a gel coat layer raw material to obtain a gel coat layer coating, coating the gel coat layer coating on a PET film of a certain thickness, pulling the PET film under the traction of a power roller to heat the gel coat coating through an oven to obtain a semi-cured gel coat initial layer, touching the surface of the gel coat initial layer with a finger, and feeling that the surface of the gel coat initial layer touched by the finger is sticky, but the gel coat does not stick to the finger; S2. The fiber-reinforced substrate layer is prepared by removing the raw materials other than the glass fiber to obtain a substrate layer coating, and the substrate layer coating is applied to the initial layer of the gel coat; S3. Lay the glass fiber flat on the base layer of coating, and fully infiltrate the base layer of coating with the glass fiber under the action of the impregnation roller; S4. After the thickness is set by the thickness setting roller, a PET film of a certain thickness is attached to the surface of the base layer; S5. Under the synchronous traction of the power roller, the fiberboard with the cover film is heated and cured in a curing oven; S6. Cutting, rolling and packaging are performed under the synchronous traction of the power roller to obtain the fiberglass reinforced plastic panel.

8. The method for processing a fiberglass panel that is not prone to cracking according to claim 7, characterized in that: In step S2, when the base layer coating is applied to the initial gel coat layer, the width of the base layer coating is greater than the width of the initial gel coat layer, and the edge of the fiber-reinforced base layer is not covered with the gel coat layer after being integrated; Alternatively, the width of the base layer coating is equal to the width of the initial gel coat layer. After being integrated and cured by heating, the gel coat layer covering the edge of the fiber-reinforced base layer is removed by grinding.