Glass fiber modified automobile composite material and preparation method thereof

Abstract

The invention discloses a glass fiber modified automobile composite material and a preparation method thereof.The glass fiber modified automobile composite material comprises a main body, the main body comprises an inner layer, a connecting layer, a base layer, a protective layer and an adhesion layer, the inner layer is located at the top of the connecting layer, the connecting layer is located at the top of the base layer, and the base layer is located at the top of the protective layer; the protective layer is located at the top of the adhesion layer, the inner layer is specifically made of a glass magnesium board, the connecting layer is specifically made of resin, the base material is specifically made of glass fibers, carbon fibers and resin, the protective layer is specifically made of polyethylene, and the adhesion layer is specifically made of epoxy resin. S1, preparing a base layer; s2, plate preparation; according to the glass fiber modified automobile composite material, other materials are added to the outer side of the basic glass fiber modified automobile composite material, so that paint on the outer layer of the composite material can be well attached, the composite material is resistant to abrasion and puncture, dust on the inner layer cannot be attached, and dust accumulation is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive composite materials, and particularly to a glass fiber modified automotive composite material and a preparation method thereof. Background Art

[0002] Glass fiber reinforced composite materials have broad application prospects in the fields of rail transit, automobiles, aerospace, etc. due to their light weight, high strength, good processing performance, strong heat resistance, and aging resistance. However, due to the low surface activity of glass fibers and poor compatibility with the polymer matrix, the bonding at the two-phase interface of the composite material is poor, and the interface is prone to failure under stress, resulting in poor overall performance of the composite material. In fiber-reinforced polymer composite materials, the quality of the interface performance is a crucial factor affecting the mechanical properties. In order to enhance the mechanical properties of the composite material, it is necessary to improve the interfacial interaction between the fiber and the polymer matrix. In view of the problems such as the defects in the structure of traditional fiber-reinforced materials and poor interfacial compatibility between the matrix and the fiber, which lead to weak interfaces in the composite material, the most common method is to modify the fiber surface to strengthen the interfacial bonding between the fiber and the polymer matrix, thereby improving the performance of the composite material. However, most studies focus on treating the fiber surface to increase surface reactive groups, surface roughness, and wettability. These traditional treatment methods usually bring about an increase in strength at the cost of loss of toughness, and less attention is paid to the influence of the interfacial layer modulus on the interfacial performance of the composite material;

[0003] The invention with the publication number of CN104402235B provides a kind of glass fiber, including: 42 - 48wt% of SiO2; 2 - 8wt% of Al2O3; 15 - 25wt% of B2O3; 3 - 8wt% of CaO; 1 - 4wt% of MgO; 0.5 - 3wt% of TiO2; 8 - 15wt% of ZnO; 5 - 12wt% of Na2O; 1 - 5wt% of Li2O; the total amount of B2O3 + Na2O does not exceed 30wt%. The softening point of the glass fiber of the above components does not exceed 600°C, and the melting temperature is low, and it can be quickly softened and melted at high temperature. When the glass fiber is used in glass fiber composite materials, it can be quickly melted at high temperature, avoiding the wick effect, inhibiting the combustion of organic materials, and making the glass fiber composite material have a flame retardant effect. Secondly, the glass fiber has small manufacturing difficulty, low production cost, good mechanical properties and stability, and can meet the strength and service life requirements of glass fiber composite materials.

[0004] The structure of the glass fiber modified automotive composite material in the prior art is single, its mechanical properties are not very ideal, it cannot provide all-round protection, and the cost is relatively high. Therefore, the present invention proposes a glass fiber modified automotive composite material and a preparation method thereof to solve the above problems. Summary of the Invention

[0005] Based on the technical problems in the background art that the structure of the glass fiber modified automotive composite material is single, its mechanical properties are not ideal, it cannot provide comprehensive protection, and the cost is relatively high, the present invention proposes a glass fiber modified automotive composite material and its preparation method.

[0006] A glass fiber modified automotive composite material proposed by the present invention includes a main body, and the main body includes an inner layer, a connection layer, a base layer, a protective layer, and an adhesion layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer.

[0007] Preferably, the specific material of the inner layer is magnesium oxychloride board, and the specific material of the connection layer is resin.

[0008] Preferably, the specific materials of the base material are glass fiber, carbon fiber, and resin, and the specific material of the protective layer is polyethylene.

[0009] Preferably, the specific material of the adhesion layer is epoxy resin.

[0010] The present invention also proposes a preparation method of the glass fiber modified automotive composite material, including the following steps:

[0011] S1: Preparation of the base layer;

[0012] S2: Preparation of the board;

[0013] S3: Preparation of the modified composite material.

[0014] Preferably, in the step S1, short fibers, long fibers, and resin are first prepared. The short fibers are glass fibers with a length of 7 - 45 mm, and the long fibers are carbon fibers with a length of 35 - 50 mm. First, the short fibers and long fibers are laid on the inner side of the mold, then resin is applied, then the short fibers and long fibers are laid again, and resin is applied again. This is repeated three times in sequence, and then hot pressing is carried out using a hot press. The parameters of the hot press are: temperature 150 - 200 °C, pressure 2 - 25 MPa, and time 10 - 25 min.

[0015] Preferably, in the step S2, the inner layer, the connection layer, the base layer, the protective layer, and the adhesion layer are cut into the same shape in sequence.

[0016] Preferably, in the step S3, the inner layer, the connection layer, the base layer, the protective layer, and the adhesion layer are stacked. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer. And glue is applied between layers, and then hot pressing is carried out using a hot press. The parameters of the hot press are: temperature 200 - 300 °C, pressure 10 - 30 MPa, and time 20 - 40 min, to obtain the glass fiber modified automotive composite material.

[0017] Advantages of the present invention:

[0018] By adding other materials outside the basic glass fiber modified automotive composite material, the present invention enables the outer layer paint of the composite material to adhere well, be wear-resistant and puncture-resistant, and prevents dust from adhering to the inner layer, thereby preventing dust accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view cross-sectional view of the main body proposed by the present invention.

[0020] Figure 2 It is a working flow chart proposed by the present invention.

[0021] In the figure: 1, main body; 2, inner layer; 3, connection layer; 4, base layer; 5, protective layer; 6, adhesion layer; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The present invention will be further explained below in conjunction with specific embodiments.

[0023] Refer to Figure 1 , Embodiment 1

[0024] In this embodiment, a glass fiber modified automotive composite material is proposed, which includes a main body. The main body includes an inner layer, a connection layer, a base layer, a protective layer, and an adhesion layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer. The specific material of the inner layer is magnesium oxychloride board, the specific material of the connection layer is resin, the specific material of the base layer is glass fiber, carbon fiber, and resin, the specific material of the protective layer is polyethylene, and the specific material of the adhesion layer is epoxy resin. Magnesium oxychloride board is an inorganic composite material formed by chemical reaction with magnesium oxide and magnesium chloride as the main gelling materials and glass fiber mesh cloth or plant fiber as the reinforcing materials. Due to its excellent fireproof, moisture-proof, light-weight and other characteristics, it is widely used in building decoration, fireproof partitions and other fields. Resin usually refers to a substance 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. 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. Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. It has the highest heat resistance among all chemical fibers and is made from acrylic fiber and viscose fiber through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace. 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. Epoxy resin has been widely used in the manufacture of adhesives for various metals and non-metals, corrosion-resistant coatings, electrical insulation materials, fiberglass reinforced plastics, etc. It plays an important role in many industrial fields such as electronics, electrical, mechanical manufacturing, aerospace, ship transportation, and has become an indispensable basic material in various industrial fields.

[0025] The present invention also proposes a preparation method for the glass fiber modified automotive composite material, which includes the following steps:

[0026] S1: Preparation of the base layer. First, prepare short fibers, long fibers and resin. The short fibers are glass fibers with a length of 12 mm, and the long fibers are carbon fibers with a length of 40 mm. First, lay the short fibers and long fibers on the inner side of the mold, then apply the resin, then lay the short fibers and long fibers again, and then apply the resin again. Repeat this process three times in sequence, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 180 °C, pressure 20 MPa, time 15 min;

[0027] S2: Sheet preparation, cutting out the same shape for the inner layer, connection layer, base layer, protective layer, and attachment layer in sequence;

[0028] S3: Modified composite material preparation, then stacking the inner layer, connection layer, base layer, protective layer, and attachment layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the attachment layer. Glue is applied between layers, and then hot pressing is carried out using a hot press. The parameters of the hot press are: temperature 220 °C, pressure 15 MPa, time 30 min, to obtain a glass fiber modified automotive composite material.

[0029] Refer to Figure 1 , Example 2

[0030] In this embodiment, a glass fiber modified automotive composite material is proposed, including a main body. The main body includes an inner layer, a connection layer, a base layer, a protective layer, and an attachment layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the attachment layer. The specific material of the inner layer is magnesite board, the specific material of the connection layer is resin, the specific material of the base material is glass fiber, carbon fiber, and resin, the specific material of the protective layer is polyethylene, and the specific material of the attachment layer is epoxy resin. Magnesite board is an inorganic composite material mainly composed of magnesium oxide and magnesium chloride as the main gelling materials, with glass fiber mesh cloth or plant fiber as the reinforcing material, and is cured through chemical reactions. Due to its excellent fire prevention, moisture resistance, light weight, and other characteristics, it is widely used in building decoration, fire prevention partitions, and other fields. Resin usually refers to a substance 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. 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. Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. It has the highest heat resistance among all chemical fibers and is made from acrylic fiber and viscose fiber as raw materials through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace. 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. Epoxy resin has been widely used in the manufacture of adhesives for various metals and non-metals, corrosion-resistant coatings, electrical insulation materials, fiberglass reinforced plastics, etc., and plays an important role in many industrial fields such as electronics, electrical, mechanical manufacturing, aerospace, ship transportation, and other fields, and has become an indispensable basic material in each industrial field.

[0031] The present invention also provides a method for preparing a glass fiber-modified automotive composite material, comprising the following steps:

[0032] S1: Preparation of the base layer. First, prepare short fibers, long fibers and resin. The short fibers are glass fibers with a length of 20 mm, and the long fibers are carbon fibers with a length of 40 mm. First, lay the short fibers and long fibers on the inner side of the mold, then apply the resin, then lay the short fibers and long fibers again, and apply the resin again. Repeat this process three times in sequence, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 180 °C, pressure 8 MPa, time 20 min;

[0033] S2: Preparation of the plate. Cut out the same shape for the inner layer, connection layer, base layer, protective layer and attachment layer in sequence;

[0034] S3: Preparation of the modified composite material. Then stack the inner layer, connection layer, base layer, protective layer and attachment layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the attachment layer. And apply glue between layers, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 270 °C, pressure 25 MPa, time 30 min, to obtain the glass fiber-modified automotive composite material.

[0035] Refer to Figure 1 , Example 3

[0036] In this embodiment, a glass fiber modified automotive composite material is proposed, including a main body. The main body includes an inner layer, a connection layer, a base layer, a protective layer, and an adhesion layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer. The specific material of the inner layer is magnesium oxychloride board, the specific material of the connection layer is resin, the specific material of the base layer is glass fiber, carbon fiber, and resin, the specific material of the protective layer is polyethylene, and the specific material of the adhesion layer is epoxy resin. Magnesium oxychloride board is an inorganic composite material mainly made of magnesium oxide and magnesium chloride, with glass fiber mesh cloth or plant fiber as the reinforcing material, and cured through chemical reactions. Due to its excellent fire resistance, moisture resistance, light weight and other characteristics, it is widely used in building decoration, fire prevention partitions and other fields. Resin usually refers to a substance 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 organic polymers. In a broad sense, any polymer compound that can be used as a processing raw material for plastic products is called resin. Glass fiber is an inorganic non-metallic material with excellent performance, 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. Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. It has the highest heat resistance among all chemical fibers, and is made from acrylic fiber and viscose fiber as raw materials through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace. 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 low water absorption, and excellent electrical insulation. Epoxy resin has been widely used in the manufacturing of bonding of various metals and non-metals, corrosion-resistant coatings, electrical insulation materials, fiberglass reinforced plastics, etc., and plays an important role in many industrial fields such as electronics, electrical, mechanical manufacturing, aerospace, ship transportation and other industries, and has become an indispensable basic material in various industrial fields.

[0037] The present invention also proposes a preparation method of the glass fiber modified automotive composite material, including the following steps:

[0038] S1: Preparation of the base layer. First, prepare short fibers, long fibers and resin. The short fibers are glass fibers with a length of 15 mm, and the long fibers are carbon fibers with a length of 40 mm. First, lay the short fibers and long fibers on the inner side of the mold, then apply the resin, then lay the short fibers and long fibers again, and apply the resin again. Repeat three layers in turn, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 180 °C, pressure 20 MPa, time 20 min;

[0039] S2: Sheet preparation, cutting out the same shape for the inner layer, connection layer, base layer, protective layer, and adhesion layer in sequence;

[0040] S3: Modified composite material preparation, then stacking the inner layer, connection layer, base layer, protective layer, and adhesion layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer. Glue is applied between layers, and then hot pressing is carried out using a hot press. The parameters of the hot press are: temperature 250°C, pressure 17 MPa, time 25 min, to obtain a glass fiber modified automotive composite material.

[0041] Refer to Figure 1 , Example 4

[0042] In this example, a glass fiber modified automotive composite material is proposed, including a main body. The main body includes an inner layer, a connection layer, a base layer, a protective layer, and an adhesion layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer. The specific material of the inner layer is magnesium oxychloride board, the specific material of the connection layer is resin, the specific material of the base material is glass fiber, carbon fiber, and resin, the specific material of the protective layer is polyethylene, and the specific material of the adhesion layer is epoxy resin. Magnesium oxychloride board is an inorganic composite material mainly composed of magnesium oxide and magnesium chloride as the main gelling materials, with glass fiber mesh cloth or plant fiber as the reinforcing material, and is cured through chemical reactions. Due to its excellent fire prevention, moisture resistance, light weight, and other characteristics, it is widely used in fields such as building decoration and fire prevention partitions. Resin usually refers to a substance 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 polymer 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. Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. It has the highest heat resistance among all chemical fibers and is made from acrylic fiber and viscose fiber as raw materials through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace. 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 low water absorption, and excellent electrical insulation. Epoxy resin has been widely used in the manufacturing of adhesions between various metals and non-metals, corrosion-resistant coatings, electrical insulation materials, fiberglass reinforced plastics, etc., and plays an important role in many industrial fields such as electronics, electrical, mechanical manufacturing, aerospace, ship transportation, and other fields, and has become an indispensable basic material in various industrial fields.

[0043] The present invention also provides a method for preparing a glass fiber modified automotive composite material, comprising the following steps:

[0044] S1: Preparation of the base layer. First, prepare short fibers, long fibers and resin. The short fibers are glass fibers with a length of 35 mm, and the long fibers are carbon fibers with a length of 40 mm. First, lay the short fibers and long fibers on the inner side of the mold, then apply the resin, then lay the short fibers and long fibers again, and apply the resin again. Repeat this three times in sequence, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 200°C, pressure 8 MPa, and time 18 min;

[0045] S2: Preparation of the plate. Cut out the same shape for the inner layer, connection layer, base layer, protective layer and attachment layer in sequence;

[0046] S3: Preparation of the modified composite material. Then stack the inner layer, connection layer, base layer, protective layer and attachment layer. The inner layer is on the top of the connection layer, the connection layer is on the top of the base layer, the base layer is on the top of the protective layer, and the protective layer is on the top of the attachment layer. And apply glue between layers, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 200°C, pressure 10 MPa, and time 20 min to obtain the glass fiber modified automotive composite material.

[0047] Refer to Figure 1 , Example Five

[0048] In this embodiment, a glass fiber modified automotive composite material is proposed, which includes a main body. The main body includes an inner layer, a connection layer, a base layer, a protective layer, and an adhesion layer. The inner layer is on top of the connection layer, the connection layer is on top of the base layer, the base layer is on top of the protective layer, and the protective layer is on top of the adhesion layer. The specific material of the inner layer is magnesium oxychloride board, the specific material of the connection layer is resin, the specific material of the base material is glass fiber, carbon fiber, and resin, the specific material of the protective layer is polyethylene, and the specific material of the adhesion layer is epoxy resin. Magnesium oxychloride board is an inorganic composite material mainly composed of magnesium oxide and magnesium chloride, with glass fiber mesh cloth or plant fiber as the reinforcing material, and is cured through chemical reactions. Due to its excellent fire prevention, moisture-proof, light weight and other characteristics, it is widely used in building decoration, fire prevention partitions and other fields. Resin usually refers to a substance 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 organic polymer. 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. Carbon fiber refers to high-strength and high-modulus fibers with a carbon content of more than 90%. It has the highest heat resistance among all chemical fibers and is made from acrylic fiber and viscose fiber as raw materials through high-temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace. 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. Epoxy resin has been widely used in the manufacturing of bonding of various metals and non-metals, corrosion-resistant coatings, electrical insulation materials, fiberglass, etc., and plays an important role in many industrial fields such as electronics, electrical, mechanical manufacturing, aerospace, ship transportation, and other fields, and has become an indispensable basic material in various industrial fields.

[0049] The present invention also proposes a preparation method for the glass fiber modified automotive composite material, which includes the following steps:

[0050] S1: Preparation of the base layer. First, prepare short fibers, long fibers, and resin. The short fibers are glass fibers with a length of 45 mm, and the long fibers are carbon fibers with a length of 50 mm. First, lay the short fibers and long fibers on the inner side of the mold, then apply the resin, then lay the short fibers and long fibers again, and then apply the resin again. Repeat this three times in sequence, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 200 °C, pressure 25 MPa, time 25 min;

[0051] S2: Sheet preparation, cutting out the same shape for the inner layer, connection layer, base layer, protective layer, and adhesion layer in sequence;

[0052] S3: Modified composite material preparation. Then stack the inner layer, connection layer, base layer, protective layer, and adhesion layer. The inner layer is on the top of the connection layer, the connection layer is on the top of the base layer, the base layer is on the top of the protective layer, and the protective layer is on the top of the adhesion layer. Apply glue between layers and then use a hot press for hot pressing. The parameters of the hot press are: temperature 300 °C, pressure 30 MPa, time 40 min, to obtain the glass fiber modified automotive composite material.

[0053] Compare the conventional glass fiber modified automotive composite material with the glass fiber modified automotive composite materials prepared in Examples 1 to 5. The results of Examples 1 to 5 are as follows in the table:

[0054] Embodiment One Two Three Four Five Lifetime increase 32％ 24％ 28％ 29％ 30％ Strength increase 30％ 20％ 25％ 26％ 20％

[0055] As can be seen from the above table, a glass fiber modified automotive composite material and its preparation method proposed by the present invention have been significantly improved, and Example 1 is the best example.

[0056] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A glass fiber modified automotive composite material, comprising a main body, characterized in that, The main body includes an inner layer, a connection layer, a base layer, a protective layer, and an adhesion layer. The inner layer is at the top of the connection layer, the connection layer is at the top of the base layer, the base layer is at the top of the protective layer, and the protective layer is at the top of the adhesion layer.

2. The glass fiber modified automotive composite material according to claim 1, characterized in that, The specific material of the inner layer is magnesium oxychloride board, and the specific material of the connection layer is resin.

3. A glass fiber modified automotive composite material according to claim 1, wherein The specific material of the base material is glass fiber, carbon fiber, and resin, and the specific material of the protective layer is polyethylene.

4. A glass fiber modified automotive composite material according to claim 1, characterized in that, The specific material of the adhesion layer is epoxy resin.

5. A preparation method of a glass fiber modified automotive composite material, characterized in that, It includes the following steps: S1: Preparation of the base layer; S2: Preparation of the board; S3: Preparation of the modified composite material.

6. The preparation method of a glass fiber modified automotive composite material according to claim 5, characterized in that, In the step S1, first prepare short fibers, long fibers, and resin. The short fibers are glass fibers with a length of 7 - 45 mm, and the long fibers are carbon fibers with a length of 35 - 50 mm. First, lay the short fibers and long fibers on the inner side of the mold, then apply the resin, then lay the short fibers and long fibers again, and then apply the resin again. Repeat this three times in sequence, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 150 - 200 °C, pressure 2 - 25 MPa, and time 10 - 25 min.

7. The preparation method of a glass fiber-modified automotive composite material according to claim 5, characterized in that, In the step S2, cut out the same shape for the inner layer, connection layer, base layer, protective layer, and adhesion layer in sequence.

8. The preparation method of a glass fiber modified automotive composite material according to claim 5, characterized in that, In the step S3, then stack the inner layer, connection layer, base layer, protective layer, and adhesion layer. The inner layer is at the top of the connection layer, the connection layer is at the top of the base layer, the base layer is at the top of the protective layer, and the protective layer is at the top of the adhesion layer. And apply glue between layers, and then use a hot press for hot pressing. The parameters of the hot press are: temperature 200 - 300 °C, pressure 10 - 30 MPa, and time 20 - 40 min to obtain a glass fiber - modified automotive composite material.

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