Glass fiber plate and application thereof in automobile fuel tank bottom guard plate

Abstract

The invention discloses a glass fiber board and application thereof in an automobile fuel tank bottom protective plate, the glass fiber board comprises a main body, the main body comprises a contact layer, a connecting layer, a middle layer, a puncture-resistant layer and a wear-resistant layer, the contact layer is adhered to the top of the connecting layer, the connecting layer is adhered to the top of the middle layer, the middle layer is adhered to the top of the puncture-resistant layer, and the wear-resistant layer is adhered to the top of the puncture-resistant layer. The puncture-resistant layer is adhered to the top of the wear-resistant layer; the specific material of the contact layer is elastic collodion, and the specific material of the connecting layer is resin. The specific material of the middle material is glass fiber resin, and the specific material of the puncture-resistant layer is polyethylene; the specific material of the wear-resistant layer is a wear-resistant rubber plate; s1, preparing a middle layer; s2, cutting is carried out; according to the manufacturing method, the glass fibers and the resin are combined, the manufactured protection plate has high quantification, rigidity, strength, impact resistance, corrosion resistance and safety compatibility, and the defects of an automobile fuel tank bottom protection plate in the prior art are greatly overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of fiberglass sheets, and particularly to a fiberglass sheet and its application in the bottom guard plate of an automobile fuel tank. Background Art

[0002] As a lightweight and high-strength composite material, fiberglass sheets (GFRP) are increasingly widely used in the bottom guard plate of automobile fuel tanks (i.e., the engine bottom guard plate). Its advantages lie in combining the mechanical properties of fiberglass and the corrosion resistance of the resin matrix, while taking into account the requirements of lightweight and safety; Most of the existing bottom guard plates of automobile fuel tanks are made of resin, metal, and plastic steel. However, the resin material may deform under long-term load, the metal guard plate is heavy, prone to rust, and hinders the sinking of the engine, and the cost of plastic steel is relatively high. Therefore, the present invention proposes a fiberglass sheet and its application in the bottom guard plate of an automobile fuel tank to solve the above problems. Summary of the Invention

[0003] Based on the technical problems in the background art that most of the bottom guard plates of automobile fuel tanks are made of resin, metal, and plastic steel, but the resin material may deform under long-term load, the metal guard plate is heavy, prone to rust, and hinders the sinking of the engine, and the cost of plastic steel is relatively high, the present invention proposes a fiberglass sheet and its application in the bottom guard plate of an automobile fuel tank.

[0004] A fiberglass sheet proposed by the present invention includes a main body, and the main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is bonded to the top of the connection layer, the connection layer is bonded to the top of the intermediate layer, the intermediate layer is bonded to the top of the puncture-resistant layer, and the puncture-resistant layer is bonded to the top of the wear-resistant layer.

[0005] Preferably, the specific material of the contact layer is elastic rubber cotton, and the specific material of the connection layer is resin.

[0006] Preferably, the specific material of the intermediate layer is fiberglass resin, and the specific material of the puncture-resistant layer is polyethylene.

[0007] Preferably, the specific material of the wear-resistant layer is a wear-resistant rubber plate.

[0008] The present invention also proposes a fiberglass sheet, and its preparation method includes the following steps: S1: Preparation of the intermediate layer; S2: Cutting; S3: Pressing.

[0009] Preferably, in the step S1, short-cut glass fibers with a length of 6 - 50 mm and continuous fibers, specifically cotton cloth with a length of 30 - 50 mm, are first prepared. Then, a resin substrate, which is epoxy resin, is prepared. Next, additives including a curing agent, a toughening agent, and a flame retardant are prepared. First, a plate mold is prepared, a release agent is applied to the inner wall of the mold, and then the short-cut glass fibers and continuous fibers are laid on the inner side of the mold. Then, resin is applied on the short-cut glass fibers and continuous fibers, and then a roller is used to press out the bubbles. After curing at room temperature, it is demolded and trimmed to obtain the intermediate layer.

[0010] Preferably, in the step S2, the contact layer, the connection layer, the intermediate layer, the puncture-resistant layer, and the wear-resistant layer are stacked in sequence, and then cut into a suitable shape.

[0011] Preferably, in the step S3, glue suitable for resin is applied to the middle of the contact layer, the connection layer, the intermediate layer, the puncture-resistant layer, and the wear-resistant layer, and then it is placed on a hot press. The temperature on the hot press is 180 - 250 °C, the pressure is 5 - 20 MPa, and the time is 5 - 30 min to obtain a glass fiber plate. The contact layer is facing up and the wear-resistant layer is facing down and installed at the bottom of the car fuel tank using bolts.

[0012] Application of a glass fiber plate in the bottom guard plate of a car fuel tank.

[0013] Advantages of the present invention: 1. The density is only 1 / 4 - 1 / 5 of that of steel, which can significantly reduce the weight of the car bottom guard plate by 30% - 50%; 2. Long glass fibers (10 - 50 mm) are used as reinforcement, significantly improving the impact resistance and wear resistance of the material, and meeting the protection requirements under complex road conditions; 3. Resistant to acids, alkalis, salt spray, and humid environments, avoiding the corrosion problem of metal guard plates and extending the service life; 4. The resin-based material can achieve the design of engine sinking through cracking or deformation during collision, avoiding hindering the operation of safety devices; By combining glass fibers and resin, the guard plate prepared by the present invention has the characteristics of light weight, high strength, impact resistance, corrosion resistance, and safety compatibility, greatly solving the shortcomings of the existing car fuel tank bottom guard plates. Brief Description of the Drawings

[0014] Figure 1 It is the main view cross-sectional view of the main body proposed by the present invention.

[0015] Figure 2 It is the working flow chart proposed by the present invention.

[0016] In the figure: 1. Main body; 2. Contact layer; 3. Connection layer; 4. Intermediate layer; 5. Puncture-resistant layer; 6. Wear-resistant layer; Detailed Implementation Modes

[0017] The present invention will be further described below in conjunction with specific embodiments.

[0018] Refer to Figure 1 , Embodiment 1 In this embodiment, a glass fiber sheet is proposed, which includes a main body. The main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is bonded to the top of the connection layer, the connection layer is bonded to the top of the intermediate layer, the intermediate layer is bonded to the top of the puncture-resistant layer, and the puncture-resistant layer is bonded to the top of the wear-resistant layer; the specific material of the contact layer is elastic collodion, and the specific material of the connection layer is resin; the specific material of the intermediate layer is glass fiber resin, the specific material of the puncture-resistant layer is polyethylene; the specific material of the wear-resistant layer is a wear-resistant rubber sheet. Elastic collodion is a rubber-based material with a porous structure and high resilience, which is made by a foaming process, combining the flexibility of rubber and the buffering characteristics of sponge, and dust is not easily attached. Resin usually refers to a material that has a softening or melting range when heated, has a tendency to flow under the action of external force, and is solid, semi-solid, or sometimes liquid at room temperature. In a broad sense, any polymer compound that can be used as a raw material for plastic product processing is called resin. Glass fiber is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. Polyethylene is a thermoplastic resin obtained by polymerizing ethylene monomers. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, good chemical stability, can resist the erosion of most acids and alkalis, is insoluble in common solvents at room temperature, has little water absorption, and has excellent electrical insulation.

[0019] A method for preparing a glass fiber sheet includes the following steps: S1: Preparation of the intermediate layer. First, prepare chopped glass fibers with a length of 15 mm and continuous fibers, specifically cotton cloth with a length of 35 mm. Then, prepare a resin substrate, which is epoxy resin. Next, prepare additives, including a curing agent, a toughening agent, and a flame retardant. First, prepare a plate mold, apply a release agent on the inner wall of the mold, then lay the chopped glass fibers and continuous fibers on the inner side of the mold, apply resin on the chopped glass fibers and continuous fibers, and then use a roller to press out the bubbles. After curing at room temperature, demold and trim the edges to obtain the intermediate layer. The curing agent, also known as a hardener, curing agent, or curing agent, is a substance or mixture that promotes or controls the curing reaction. The curing of the resin is an irreversible change process of thermosetting resin through chemical reactions such as condensation, ring closure, addition, or catalysis. Curing is completed by adding a curing (crosslinking) agent. The toughening agent is a substance that can increase the flexibility of the adhesive film layer. Some thermosetting resin adhesives, such as epoxy resin, phenolic resin, and unsaturated polyester resin adhesives, have low elongation and high brittleness after curing. When the bonded part is subjected to external force, cracks are easily generated and rapidly expand, resulting in the cracking of the adhesive layer, poor fatigue resistance, and inability to be used as a structural bond. Therefore, it is necessary to reduce brittleness, increase toughness, and improve the bearing strength. The flame retardant is a special chemical additive used to improve the combustion performance of combustible and flammable materials. After being processed with a flame retardant, the material can effectively prevent, delay, or terminate the spread of fire when attacked by an external fire source, thus achieving the flame retardant effect; S2: Cutting. First, stack the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer in sequence, and then cut out a suitable shape; S3: Pressing. First, apply glue suitable for the resin between the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer, and then place it on a hot press. The temperature on the hot press is 200 °C, the pressure is 12 MPa, and the time is 15 min to obtain a glass fiber board. Use bolts to install it on the bottom of the car fuel tank with the contact layer facing up and the wear-resistant layer facing down.

[0020] Refer to Figure 1 , Example 2 In this embodiment, a fiberglass sheet is proposed, which includes a main body. The main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is adhesively bonded to the top of the connection layer, the connection layer is adhesively bonded to the top of the intermediate layer, the intermediate layer is adhesively bonded to the top of the puncture-resistant layer, and the puncture-resistant layer is adhesively bonded to the top of the wear-resistant layer. The specific material of the contact layer is elastic cotton, and the specific material of the connection layer is resin. The specific material of the intermediate layer is fiberglass resin, the specific material of the puncture-resistant layer is polyethylene, and the specific material of the wear-resistant layer is a wear-resistant rubber plate. Elastic cotton is a rubber-based material with a porous structure and high resilience, which is made by a foaming process, combining the flexibility of rubber and the cushioning characteristics of sponge, and dust is not easily attached. Resin generally refers to an organic polymer that has a softening or melting range when heated, has a tendency to flow under the action of external force when softened, and is solid, semi-solid, or sometimes liquid at room temperature. In a broad sense, any high-molecular compound that can be used as a processing raw material for plastic products is called resin. Fiberglass is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. Polyethylene is a thermoplastic resin obtained by polymerizing ethylene monomers. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, good chemical stability, can resist the erosion of most acids and alkalis, is insoluble in general solvents at room temperature, has little water absorption, and has excellent electrical insulation.

[0021] A method for preparing a fiberglass sheet includes the following steps: S1: Preparation of the intermediate layer. First, prepare chopped glass fibers with a length of 22 mm and continuous fibers, specifically cotton cloth with a length of 35 mm. Then, prepare a resin substrate, which is epoxy resin. Next, prepare additives, including a curing agent, a toughening agent, and a flame retardant. First, prepare a plate mold, apply a release agent on the inner wall of the mold, then lay the chopped glass fibers and continuous fibers on the inner side of the mold, apply resin on the chopped glass fibers and continuous fibers, and then use a roller to press out the bubbles. After curing at room temperature, demold and trim the edges to obtain the intermediate layer. The curing agent is also known as a hardening agent, a curing agent, or a setting agent, and is a substance or mixture that promotes or controls the curing reaction. The curing of the resin is an irreversible change process of thermosetting resin through chemical reactions such as condensation, ring closure, addition, or catalysis. Curing is completed by adding a curing (crosslinking) agent. The toughening agent is a substance that can increase the flexibility of the adhesive film layer. Some thermosetting resin adhesives, such as epoxy resin, phenolic resin, and unsaturated polyester resin adhesives, have low elongation and high brittleness after curing. When the bonded part is subjected to external force, cracks are easily generated and quickly expand, resulting in the cracking of the adhesive layer, poor fatigue resistance, and inability to be used as a structural bond. Therefore, it is necessary to reduce brittleness, increase toughness, and improve the bearing strength. The flame retardant is a special chemical additive used to improve the combustion performance of combustible and flammable materials. After being processed with the flame retardant, the material can effectively prevent, delay, or terminate the spread of the flame when attacked by an external fire source, thus achieving the flame retardant effect; S2: Cutting. First, stack the contact layer, the connection layer, the intermediate layer, the puncture-resistant layer, and the wear-resistant layer in sequence, and then cut out a suitable shape; S3: Laminating. First, apply glue suitable for the resin between the contact layer, the connection layer, the intermediate layer, the puncture-resistant layer, and the wear-resistant layer, and then place it on a hot press. The temperature on the hot press is 180 °C, the pressure is 15 MPa, and the time is 25 min to obtain a glass fiber board. Use bolts to install it on the bottom of the car fuel tank with the contact layer facing up and the wear-resistant layer facing down.

[0022] Refer to Figure 1 , Example 3 In this embodiment, a fiberglass sheet is proposed, which includes a main body. The main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is adhesively bonded to the top of the connection layer, the connection layer is adhesively bonded to the top of the intermediate layer, the intermediate layer is adhesively bonded to the top of the puncture-resistant layer, and the puncture-resistant layer is adhesively bonded to the top of the wear-resistant layer. The specific material of the contact layer is elastic cotton, and the specific material of the connection layer is resin. The specific material of the intermediate layer is fiberglass resin, the specific material of the puncture-resistant layer is polyethylene, and the specific material of the wear-resistant layer is a wear-resistant rubber plate. Elastic cotton is a rubber-based material with a porous structure and high resilience, which is made by a foaming process, combining the flexibility of rubber and the buffering characteristics of sponge, and dust is not easily attached. Resin usually refers to an organic polymer that has a softening or melting range when heated, has a tendency to flow under the action of external force, is solid, semi-solid at room temperature, and sometimes can also be liquid. In a broad sense, any high-molecular compound that can be used as a processing raw material for plastic products is called resin. Fiberglass is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. Polyethylene is a thermoplastic resin obtained by polymerizing ethylene monomers. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, good chemical stability, can resist the erosion of most acids and alkalis, is insoluble in general solvents at room temperature, has little water absorption, and has excellent electrical insulation.

[0023] A method for preparing a fiberglass sheet includes the following steps: S1: Preparation of the intermediate layer. First, prepare chopped glass fibers with a length of 25 mm and continuous fibers, specifically cotton cloth with a length of 45 mm. Then, prepare a resin substrate, which is epoxy resin. Next, prepare additives, including a curing agent, a toughening agent, and a flame retardant. First, prepare a plate mold, apply a release agent on the inner wall of the mold, then lay the chopped glass fibers and continuous fibers on the inner side of the mold, apply resin on the chopped glass fibers and continuous fibers, and then use a roller to press out the bubbles. After curing at room temperature, demold and trim the edges to obtain the intermediate layer. The curing agent, also known as a hardener, curing agent, or setting agent, is a substance or mixture that promotes or controls the curing reaction. The curing of the resin is an irreversible change process of thermosetting resin through chemical reactions such as condensation, ring closure, addition, or catalysis. Curing is completed by adding a curing (crosslinking) agent. The toughening agent is a substance that can increase the flexibility of the adhesive film layer. Some thermosetting resin adhesives, such as epoxy resin, phenolic resin, and unsaturated polyester resin adhesives, have low elongation and high brittleness after curing. When the bonded part is subjected to external force, cracks are easily generated and quickly expand, resulting in the cracking of the adhesive layer, poor fatigue resistance, and inability to be used as a structural bond. Therefore, it is necessary to reduce brittleness, increase toughness, and improve the bearing strength. The flame retardant is a special chemical additive used to improve the combustion performance of combustible and flammable materials. After being processed with the flame retardant, the material can effectively prevent, delay, or terminate the spread of the flame when attacked by an external fire source, thus achieving the flame retardant effect; S2: Cutting. First, stack the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer in sequence, and then cut out a suitable shape; S3: Pressing. First, apply glue suitable for the resin between the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer, and then place it on a hot press. The temperature on the hot press is 230 °C, the pressure is 8 MPa, and the time is 22 min to obtain a glass fiber board. Use bolts to install it on the bottom of the car fuel tank with the contact layer facing up and the wear-resistant layer facing down.

[0024] Refer to Figure 1 , Example 4 In this embodiment, a glass fiber sheet is proposed, which includes a main body. The main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is bonded to the top of the connection layer, the connection layer is bonded to the top of the intermediate layer, the intermediate layer is bonded to the top of the puncture-resistant layer, and the puncture-resistant layer is bonded to the top of the wear-resistant layer. The specific material of the contact layer is elastic collodion, and the specific material of the connection layer is resin. The specific material of the intermediate layer is glass fiber resin, the specific material of the puncture-resistant layer is polyethylene, and the specific material of the wear-resistant layer is a wear-resistant rubber plate. Elastic collodion is a rubber-based material with a porous structure and high resilience, which is made by a foaming process, combining the flexibility of rubber and the buffering characteristics of sponge, and dust is not easily attached. Resin usually refers to an organic polymer that has a softening or melting range when heated, has a tendency to flow under the action of external force when softened, and is solid, semi-solid at room temperature, and sometimes can also be liquid. In a broad sense, any high molecular compound that can be used as a processing raw material for plastic products is called resin. Glass fiber is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. Polyethylene is a thermoplastic resin obtained by polymerizing ethylene monomers. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, good chemical stability, can resist the erosion of most acids and alkalis, is insoluble in general solvents at room temperature, has little water absorption, and has excellent electrical insulation.

[0025] A method for preparing a glass fiber sheet includes the following steps: S1: Preparation of the intermediate layer. First, prepare chopped glass fibers with a length of 6 mm and continuous fibers, specifically cotton cloth with a length of 30 mm. Then, prepare a resin substrate, which is epoxy resin. Next, prepare additives, including a curing agent, a toughening agent, and a flame retardant. First, prepare a plate mold, apply a release agent to the inner wall of the mold, then lay the chopped glass fibers and continuous fibers on the inner side of the mold, apply resin on the chopped glass fibers and continuous fibers, and then use a roller to press out the bubbles. After curing at room temperature, demold and trim the edges to obtain the intermediate layer. The curing agent, also known as the hardening agent, curing agent, or setting agent, is a substance or mixture that promotes or controls the curing reaction. The curing of the resin is an irreversible change process of thermosetting resin through chemical reactions such as condensation, ring closure, addition, or catalysis. Curing is completed by adding a curing (crosslinking) agent. The toughening agent is a substance that can increase the flexibility of the adhesive film layer. Some thermosetting resin adhesives, such as epoxy resin, phenolic resin, and unsaturated polyester resin adhesives, have low elongation and high brittleness after curing. When the bonded part is subjected to external force, cracks are easily generated and rapidly expand, resulting in the cracking of the adhesive layer, poor fatigue resistance, and inability to be used as a structural bond. Therefore, it is necessary to reduce brittleness, increase toughness, and improve the bearing strength. The flame retardant is a special chemical additive used to improve the combustion performance of combustible and flammable materials. After being processed with the flame retardant, the material can effectively prevent, delay, or terminate the spread of the flame when attacked by an external fire source, thus achieving the flame retardant effect; S2: Cutting. First, stack the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer in sequence, and then cut out a suitable shape; S3: Pressing. First, apply glue suitable for the resin between the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer, and then place it on a hot press. The temperature on the hot press is 180 °C, the pressure is 5 MPa, and the time is 5 min to obtain a glass fiber board. Use bolts to install it on the bottom of the car fuel tank with the contact layer facing up and the wear-resistant layer facing down.

[0026] Refer to Figure 1 , Example Five In this embodiment, a glass fiber sheet is proposed, which includes a main body. The main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is adhesively bonded to the top of the connection layer, the connection layer is adhesively bonded to the top of the intermediate layer, the intermediate layer is adhesively bonded to the top of the puncture-resistant layer, and the puncture-resistant layer is adhesively bonded to the top of the wear-resistant layer. The specific material of the contact layer is elastic collodion, and the specific material of the connection layer is resin. The specific material of the intermediate layer is glass fiber resin, the specific material of the puncture-resistant layer is polyethylene, and the specific material of the wear-resistant layer is a wear-resistant rubber sheet. Elastic collodion is a rubber-based material with a porous structure and high resilience, which is made by a foaming process, combining the flexibility of rubber and the buffering characteristics of sponge, and dust is not easily attached. Resin usually refers to an organic polymer that has a softening or melting range when heated, has a tendency to flow under the action of external force when softened, and is solid, semi-solid at room temperature, and sometimes can also be liquid. In a broad sense, any high molecular compound that can be used as a processing raw material for plastic products is called resin. Glass fiber is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength, but its disadvantages are brittleness and poor wear resistance. Polyethylene is a thermoplastic resin obtained by polymerizing ethylene monomers. Polyethylene is odorless, non-toxic, feels like wax, has excellent low-temperature resistance, good chemical stability, can resist the erosion of most acids and alkalis, is insoluble in general solvents at room temperature, has little water absorption, and has excellent electrical insulation.

[0027] A method for preparing a glass fiber sheet includes the following steps: S1: Preparation of the middle layer. First, prepare short glass fibers with a length of 50 mm and continuous fibers. The specific material is cotton cloth with a length of 50 mm. Then prepare the resin substrate, which is epoxy resin. Then prepare additives, including curing agent, toughening agent and flame retardant. First, prepare the plate mold, apply a release agent on the inner wall of the mold, and then lay short glass fibers and continuous fibers on the inner side of the mold. Then apply resin on the short glass fibers and continuous fibers, and then use rollers to expel bubbles. After curing at room temperature, demould and trim the edges to obtain the middle layer. The curing agent, also known as a hardener, a curing agent or a setting agent, is a type of substance or mixture that enhances or controls the curing reaction. Resin curing is a process in which thermosetting resins undergo irreversible changes through chemical reactions such as condensation, ring closure, addition or catalysis. Curing is accomplished by adding a curing (cross-linking) agent. Toughening agent refers to a substance that can increase the flexibility of the adhesive film layer. Some thermosetting resin adhesives, such as epoxy resin, phenolic resin and unsaturated polyester resin adhesives, have low elongation and high brittleness after curing. When the bonding part is subjected to external force, cracks are easily generated and rapidly expand, resulting in cracking of the adhesive layer. They are not fatigue-resistant and cannot be used for structural bonding. Therefore, it is necessary to try to reduce brittleness, increase toughness and improve bearing strength. Flame retardant is a special chemical additive used to improve the combustion performance of combustible and flammable materials. Materials processed with flame retardants can effectively prevent, delay or terminate the spread of flames when attacked by external fire sources, thereby achieving the effect of flame retardancy. S2: Cutting: first stack the contact layer, the connecting layer, the middle layer, the puncture-resistant layer and the wear-resistant layer in sequence, and then cut them into a suitable shape; S3: Lamination: first apply the glue of suitable resin to the contact layer, connecting layer, middle layer, puncture-resistant layer and wear-resistant layer, and then place them on a hot press. The temperature on the hot press is 250°C, the pressure is 20MPa, and the time is 30min. The glass fiber sheet is obtained and installed on the bottom of the automobile fuel tank with bolts, with the contact layer facing up and the wear-resistant layer facing down.

[0028] Comparing the conventional glass fiber board with the glass fiber board prepared in Examples 1 to 5, the glass fiber boards prepared in Examples 1 to 5 are as follows:

[0029] It can be seen from the above table that the glass fiber board proposed by the present invention and its application in the bottom guard plate of the automobile fuel tank have obvious improvements, and implementation four is the best implementation example.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fiberglass sheet, comprising a main body, characterized in that, The main body includes: a contact layer, a connection layer, an intermediate layer, a puncture-resistant layer, and a wear-resistant layer. The contact layer is adhered to the top of the connection layer, the connection layer is adhered to the top of the intermediate layer, the intermediate layer is adhered to the top of the puncture-resistant layer, and the puncture-resistant layer is adhered to the top of the wear-resistant layer.

2. The fiberglass sheet according to claim 1, characterized in that, The specific material of the contact layer is elastic rubber cotton, and the specific material of the connection layer is resin.

3. A fiberglass sheet according to claim 1, wherein, The specific material of the intermediate layer is fiberglass resin, and the specific material of the puncture-resistant layer is polyethylene.

4. A fiberglass sheet according to claim 1, characterized in that, The specific material of the wear-resistant layer is a wear-resistant rubber plate.

5. A fiberglass sheet, characterized in that, Its preparation method includes the following steps: S1: Preparation of the intermediate layer; S2: Cutting; S3: Pressing.

6. A fiberglass sheet according to claim 5, characterized in that, In the step S1, first prepare chopped glass fibers with a length of 6 - 50 mm and continuous fibers with a specific material of cotton cloth and a length of 30 - 50 mm. Then prepare a resin substrate, which is epoxy resin. Then prepare additives, including a curing agent, a toughening agent, and a flame retardant. First prepare a plate mold, apply a release agent on the inner wall of the mold, then lay the chopped glass fibers and continuous fibers on the inner side of the mold, apply resin on the chopped glass fibers and continuous fibers, and then use a roller to remove air bubbles. After curing at room temperature, demold and trim the edges to obtain the intermediate layer.

7. A fiberglass sheet according to claim 5, characterized in that In the step S2, stack the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer in sequence first, and then cut out a suitable shape.

8. A fiberglass sheet according to claim 5, characterized in that, In the step S3, first apply glue suitable for the resin between the contact layer, connection layer, intermediate layer, puncture-resistant layer, and wear-resistant layer, and then place it on a hot press. The temperature on the hot press is 180 - 250 °C, the pressure is 5 - 20 MPa, and the time is 5 - 30 min to obtain a fiberglass plate. Use bolts to install it on the bottom of the car fuel tank with the contact layer facing up and the wear-resistant layer facing down.

9. Application of the fiberglass plate according to any one of claims 1 - 8 in the bottom guard plate of a car fuel tank.

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