Carbon fiber glass fiber composite plate

Abstract

The utility model discloses a kind of carbon fiber glass fiber composite board, comprising: outer protective film, protective net layer, upper shock-absorbing rubber pad, mainboard, lower shock-absorbing rubber pad;Upper shock-absorbing rubber pad inner side is attached to the upside of mainboard, lower shock-absorbing rubber pad inner side is attached to the downside of mainboard, upper shock-absorbing rubber pad and lower shock-absorbing rubber pad outer side are respectively glued two sides protective net layer inner side, two sides protective net layer outer side is respectively attached two sides outer protective film.The utility model uses plastic instead of steel, multilayer protection, light weight and safety protection are considered;The grid cloth filled has good air removal and permeability, effectively reduces segregation, air hole, improves strength uniformity;Layer by layer shock absorption, buffering effect is good;Outer protective film replaces lacquer film, mechanical strength and anti-aging are considered, and have the effect of emission reduction and improvement production environment.

Description

Technical Field

[0001] This invention belongs to the field of new materials technology, specifically relating to a carbon fiber and glass fiber composite board. Background Technology

[0002] New energy vehicles, due to their inferior engine power and range compared to traditional fuel vehicles, are currently developing primarily towards lighter vehicles such as private cars. Existing steel protective plates can effectively resist external impacts, but their heavy weight and high energy consumption during operation reduce the range and hill-climbing ability of new energy vehicles. Many new energy vehicles use engineering plastic protective plates in pursuit of lightweight design, but these have poor crack resistance and even worse puncture resistance, resulting in poor protection. The balance between lightweight design and protection in automotive protective plate components has become a contradiction. Currently, some automakers have begun to launch electric trucks and natural gas trucks, and to balance lightweight design and protection, fiber-reinforced composite panels are starting to replace engineering plastic and steel plates in the protective plate components of new energy vehicles.

[0003] Fiber-reinforced composite panels can be filled with different types of fibers according to specific application requirements, thereby obtaining different properties. Composite panels reinforced with mixed fillings have good mechanical strength and comprehensive performance. For example, in carbon fiber and glass fiber composite panels, filling with carbon fiber can improve the strength and stiffness of the material, while filling with glass fiber can increase the toughness and impact resistance of the material. The mixed filling of the two can balance the advantages and disadvantages of both, making it very suitable for protective panel components.

[0004] The fiber filling methods for carbon fiber and fiberglass composite boards are mainly divided into blended fabric filling and loose fiber filling. Blended fabric filling can better improve the mechanical strength of the board, but the layered stacking of blended fabric during the filling process can easily trap air bubbles, resulting in poor degassing and material defects such as high porosity, high interlayer ratio, and high segregation. Its filling reinforcement effect is also related to the fabric direction. Since each layer of fabric is parallel to each other, it causes uneven strength in both longitudinal and transverse directions, with transverse strength being lower than longitudinal strength. In the loose fiber filling structure, air bubbles can be released through the gaps between fibers, resulting in good degassing. Since loose fiber filling is a non-directional filler, the strength uniformity is good, but the overall strength is not as good as that of the blended fabric filling structure, and the crack resistance and puncture resistance are also not as good. How to balance crack resistance, puncture resistance, strength uniformity, and the elimination of material defects such as porosity and interlayer has become a contradiction to be solved.

[0005] Composite material protective panels generally do not have the same anti-aging properties as metal protective panels. To improve the anti-aging properties of fiber-reinforced composite panels, anti-aging agents need to be added, but the dosage must be strictly controlled, otherwise the mechanical strength of the panel will be reduced. How to balance the mechanical strength and anti-aging properties of composite materials has become a contradiction. Although the hardness and wear resistance of carbon fiber and glass fiber composite panels are comparable to those of engineering plastics, they are still inferior to steel protective panels and are easily scratched. How to improve the surface hardness and wear resistance of carbon fiber and glass fiber composite panels while ensuring their lightweight and high strength is also a problem to be solved. Utility Model Content

[0006] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a carbon fiber and glass fiber composite board that combines lightweight, protective and anti-aging properties.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a carbon fiber and glass fiber composite board, comprising: the present invention is a carbon fiber and glass fiber composite board with a multi-layer structure, including: an outer protective film, a protective mesh layer, an upper shock-absorbing pad, a main board, and a lower shock-absorbing pad; the inner side of the upper shock-absorbing pad is attached to the upper side of the main board, the inner side of the lower shock-absorbing pad is attached to the lower side of the main board, the outer sides of the upper and lower shock-absorbing pads are respectively bonded to the inner sides of the two protective mesh layers, the two protective mesh layers are mirror-symmetrical to each other, and the outer sides of the two protective mesh layers are respectively attached to the outer sides of the two outer protective films, the two outer protective films are mirror-symmetrical to each other.

[0008] The outer protective film is a tempered glass film for car windows, which is attached to the outside of the protective mesh layer. It can replace the paint film and effectively prevent the protective mesh layer from being worn or scratched. The outer protective film is easy to replace if it is damaged.

[0009] The protective mesh layer consists of a coarse mesh fabric filled with a fiberglass polyurethane coating. The coarse mesh fabric has rectangular mesh openings with an aspect ratio of 3:1. Each layer of coarse mesh fabric is laid with the mesh openings staggered at 90°, and the layers are bonded together using a structural adhesive. The structural adhesive is a polyurethane-polyurea two-component adhesive, which contains 10% to 15% short fiberglass. The coarse mesh fabric has relatively large openings, allowing the short fiberglass to fully penetrate between the mesh openings along with the structural adhesive during the bonding process. Gas seeps out with the mesh openings, achieving a fiber-filling effect, which improves lateral strength and strength uniformity. The 3:1 aspect ratio of the coarse mesh fabric and the 90° staggered mesh openings mean that the gap between adjacent layers is only 1 / 3 of the original mesh opening, thus refining the mesh and balancing permeability and filling properties.

[0010] The main board is a hot-rolled patterned plate with a low, narrow rectangular step on its upper side and a corresponding shallow, narrow rectangular groove on its lower side. It is made of carbon fiber and glass fiber blended mesh reinforced polypropylene. Polypropylene is modified with polyethylene and polybutadiene. The addition of polyethylene improves the toughness and impact resistance of the modified polypropylene plate, while polybutadiene serves as the elastomer component, combining rigidity and flexibility to enhance the elongation and fatigue resistance of the modified polypropylene plate. The carbon fiber and glass fiber blended mesh is arranged in layers of coarse and fine mesh to act as the main board's reinforcement, with a layer of fine mesh sandwiched between each layer. The coarse mesh acts as a reinforcing rib to improve tensile strength and crack resistance, while the fine mesh, with its uniform mesh size, allows for better adhesion of polypropylene, promotes uniform crystallization of polypropylene, and acts as a connecting bond between crystal lattices, preventing the generation and propagation of microcracks, further improving crack resistance and impact resistance. During the hot rolling process of rectangular steps and rectangular grooves, the mesh and the fiber flow lines of the polypropylene will also be twisted, improving transverse strength and reducing the difference between longitudinal and transverse strength. The rectangular steps are short and narrow, and the rectangular grooves are shallow and narrow, resulting in minimal stretching of the mesh and preventing the mesh ropes from breaking during hot rolling.

[0011] The upper shock-absorbing pad has a groove on its lower side that corresponds to the rectangular step on the motherboard side; the material is long glass fiber filled polyurethane foam resin, which serves as a buffer pad and heat insulation layer.

[0012] The lower shock-absorbing pad has a step on its underside that corresponds to the rectangular groove on the underside of the motherboard; the material is long glass fiber filled polyurethane foam resin, which serves as both a buffer pad and a heat insulation layer.

[0013] The impact resistance, crack resistance, and puncture resistance testing methods of this utility model can be directly applied to the safety guard plate steel cone impact test:

[0014] When the steel cone pierces the outer protective membrane and then the protective mesh layer, the outer membrane, with its inherent crack resistance, can restrain the steel cone, limiting its further penetration. The coarse mesh of the protective mesh layer, with its thick and sturdy fibers, high resilience, and high tensile strength, can effectively contain the steel cone. The structural adhesive filling the protective mesh layer, with its elasticity, toughness, and high tensile strength, can better restrain the steel cone, preventing it from penetrating further. The upper shock-absorbing pads act as a buffer, reducing the impact load on the steel cone. The long glass fiber-filled polyurethane foam resin, with its high tensile strength and good toughness, also effectively restrains the steel cone, limiting its further penetration. When the steel cone pierces... When the steel cone penetrates the motherboard through the outer protective film, protective mesh layer, and upper shock-absorbing pad, the modified polypropylene combines rigidity and flexibility, effectively preventing cracking and deformation at the penetration point, locking the steel cone, and reducing its penetration. The coarse mesh can effectively encase the steel cone and act as a reinforcing rib of the motherboard, pulling it to hold the motherboard substrate and preventing crack propagation. The fine mesh can act as a connecting bond between crystal lattices, preventing the generation and extension of micro-cracks, achieving a continuous effect and avoiding fragmentation, thus better locking the steel cone. Even if the steel cone penetrates the motherboard, the lower shock-absorbing pad, protective mesh layer, and outer protective film on the underside of the motherboard can continue to lock the steel cone, preventing it from penetrating the board.

[0015] Compared with the existing technology, the present invention has the following advantages:

[0016] This invention offers excellent lightweighting: it replaces steel with plastic, effectively reducing weight; it employs a multi-layered combined protective structure to replace the engineering plastic sheet structure, which can reduce the sheet thickness and make it lighter while ensuring mechanical strength.

[0017] This utility model offers excellent safety protection: it adopts a multi-layer combined protective structure to replace the single-material board structure, featuring a main board that combines rigidity and flexibility, a protective mesh layer with high tensile strength and resilience, and upper and lower shock-absorbing pads with excellent toughness and elasticity. This balances rigidity, toughness, and elasticity, effectively improving the board's impact resistance, crack resistance, and puncture resistance.

[0018] The present invention has a good shock absorption and cushioning effect: the upper and lower shock absorption pads are both made of polyurethane foam resin, which has a good shock absorption and cushioning effect; the coarse mesh of the protective mesh layer has a large resilience, and the filling structural adhesive also has elasticity and toughness, resulting in a good shock absorption and cushioning effect; polybutadiene is used as a component of the modified polypropylene elastomer of the motherboard, which effectively improves the elasticity of the motherboard, resulting in a very good overall shock absorption effect.

[0019] The main board and protective mesh layer of this invention have low porosity and minimal segregation: the carbon fiber and glass fiber blended mesh fabric filled in the main board allows internal gas to be released through the mesh during board processing, effectively reducing porosity and interlayering; the fine mesh fabric has a uniform mesh size, which allows for better adhesion of polypropylene, promotes uniform crystallization of polypropylene, improves material uniformity, and reduces segregation; the coarse mesh fabric of the protective mesh layer has larger mesh openings, allowing short glass fibers to fully penetrate between the mesh openings along with the structural adhesive during the layer-by-layer bonding process, while gas seeps out through the mesh openings, leaving no interlayering or pores, achieving the effect of dispersed fiber filling. The mesh openings of each layer are laid at 90° intervals, and the gap between adjacent mesh openings is only 1 / 3 of the original mesh opening, which serves to refine the mesh, taking into account both permeability and filling properties, and improving material uniformity.

[0020] This invention balances mechanical strength and aging resistance: the mainboard is wrapped inside the upper and lower shock-absorbing pads. Polyurethane has better aging resistance than polypropylene and can also act as a heat insulation layer, reducing the impact of temperature on the mainboard (see existing polyurethane heat insulation layer polypropylene pipes), effectively improving the mainboard's aging resistance; protective mesh layers are bonded to the outer sides of the upper and lower shock-absorbing pads, and an outer protective film is attached to the outer side of both protective mesh layers to isolate external media and prevent the internal structure from contacting air, thereby delaying the aging of the internal structure; no anti-aging agent needs to be added, and the mechanical strength is not affected.

[0021] This invention exhibits good strength uniformity: the coarse mesh of the protective mesh layer has large openings, allowing short glass fibers to fully penetrate between the mesh openings along with the filling structural adhesive, achieving a fiber-filling effect that improves transverse strength and strength uniformity; the main board is a hot-rolled patterned plate, and the mesh and polypropylene fiber flow lines filled during the hot-rolling of rectangular steps and rectangular grooves will also be twisted accordingly, improving transverse strength and reducing the difference between longitudinal and transverse strength.

[0022] This invention has good emission reduction effect and a good production environment: the outer protective film is attached to the outside of the protective net layer and can replace the paint film, avoiding the waste gas and waste liquid generated by the painting production line, and also avoiding the manufacturer's contact with the toxic and harmful substances generated by the painting.

[0023] The outer protective film of this utility model is a tempered glass film for car windows, which can effectively prevent wear and scratches on the protective mesh layer and is easy to replace after being damaged.

[0024] This utility model has good versatility. It is not only suitable for protective plates for new energy vehicles, but also applicable to other protective plates. Attached Figure Description

[0025] Figure 1 A schematic diagram of the structure of this utility model;

[0026] Figure 2 Top view of the motherboard of this utility model. Detailed Implementation

[0027] like Figure 1 , Figure 2 As shown, this utility model is a carbon fiber and glass fiber composite board with a multi-layer structure, including: an outer protective film 1, a protective mesh layer 2, an upper shock-absorbing pad 3, a main board 4, and a lower shock-absorbing pad 5; the inner side of the upper shock-absorbing pad 3 is attached to the upper side of the main board 4, and the inner side of the lower shock-absorbing pad 5 is attached to the lower side of the main board 4. The outer sides of the upper shock-absorbing pad 3 and the lower shock-absorbing pad 5 are respectively bonded to the inner sides of the two protective mesh layers 2. The two protective mesh layers 2 are mirror images of each other. The outer protective films 1 are respectively attached to the outer sides of the two protective mesh layers 2. The two outer protective films 1 are mirror images of each other.

[0028] The outer protective film 1 is a tempered glass film for car windows, which is attached to the outside of the protective mesh layer 2. It isolates the protective mesh layer 2 from the external medium, can replace the paint film, improve the anti-aging effect of the protective mesh layer 2, and can effectively prevent the protective mesh layer 2 from being worn or scratched. The outer protective film 1 is easy to replace after being damaged.

[0029] The protective mesh layer 2 is a coarse mesh filled with glass fiber and coated with polyurethane. The coarse mesh has rectangular mesh openings with an aspect ratio of 3:1. Each layer of coarse mesh is laid with the mesh openings staggered at 90°, and bonded layer by layer using a structural adhesive. The structural adhesive is a polyurethane-polyurea two-component adhesive, which contains 10% to 15% short glass fiber. The polyurethane-polyurea two-component adhesive has elasticity, toughness, and high tensile strength. The coarse mesh acts as the framework for the structural adhesive, and the mesh cord is a tennis racket cord, which has high tensile strength and high resilience, serving as an elastic protective net. The coarse mesh has relatively large openings, allowing the short glass fiber to fully penetrate between the mesh openings along with the structural adhesive during the bonding process. Gas seeps out with the mesh openings, leaving no interlayers or pores, achieving a fiber-filling effect, improving lateral strength and strength uniformity. The aspect ratio of the coarse mesh is 3:1. 1. Each layer of mesh is laid with the holes staggered at 90°. The gap between two adjacent layers of mesh is only 1 / 3 of the original mesh, which serves to refine the mesh and balances permeability and filling properties.

[0030] The main board 4 is a hot-rolled patterned plate with a low and narrow rectangular step on its upper side and a corresponding shallow and narrow rectangular groove on its lower side. Its material is carbon fiber and glass fiber blended mesh reinforced polypropylene. Polypropylene is modified with polyethylene and polybutadiene. The addition of polyethylene improves the toughness and impact resistance of the modified polypropylene board, while polybutadiene serves as the elastomer component, combining rigidity and flexibility to improve the extensibility and fatigue resistance of the modified polypropylene board. The carbon fiber and glass fiber blended mesh is arranged in layers of coarse and fine mesh to act as the main board's reinforcement. Each layer of fine mesh has a layer of coarse mesh sandwiched between it. The coarse mesh acts as a reinforcing rib to improve tensile strength and crack resistance. Uniformity allows for better adhesion of polypropylene, promotes uniform crystallization, and acts as a bonding agent between crystal lattices, preventing the generation and propagation of microcracks and further improving crack resistance and impact resistance. Carbon fiber can improve the strength and stiffness of the material, while glass fiber can increase its toughness and impact resistance, combining rigidity and flexibility to effectively improve the impact resistance and crack resistance of modified polypropylene sheets. During the hot rolling process of rectangular steps and rectangular grooves, the mesh cloth and the fiber flow lines of polypropylene will also be twisted, improving transverse strength and reducing the difference between longitudinal and transverse strength. The rectangular steps are short and narrow, and the rectangular grooves are shallow and narrow, resulting in minimal stretching of the mesh cloth and preventing the mesh cloth ropes from breaking during hot rolling.

[0031] The upper shock-absorbing pad 3 has a groove on its lower side that corresponds to the rectangular step on the upper side of the main board 4; the material is long glass fiber filled polyurethane foam resin. The long glass fiber forms a continuous network structure in the polyurethane foam resin, which can cross the gaps between air bubbles and form connecting bonds, effectively improving the tensile strength and toughness of the polyurethane foam resin, and acting as a buffer pad and heat insulation layer.

[0032] The lower shock-absorbing pad 5 has a step on its lower side that corresponds to the rectangular groove on the lower side of the main board 4; the material is long glass fiber filled polyurethane foam resin. The long glass fiber forms a continuous network structure in the polyurethane foam resin, which can cross the gaps between air bubbles and form connecting bonds, effectively improving the tensile strength and toughness of the polyurethane foam resin, and acting as a buffer pad and heat insulation layer.

Claims

1. A carbon fiber and glass fiber composite board, comprising: Outer protective film, protective mesh layer, upper shock-absorbing pad, motherboard, lower shock-absorbing pad; The inner side of the upper shock-absorbing pad is attached to the upper side of the motherboard, and the inner side of the lower shock-absorbing pad is attached to the lower side of the motherboard; the feature is that the outer sides of the upper and lower shock-absorbing pads are respectively bonded to the inner sides of the two protective mesh layers, and the outer sides of the two protective mesh layers are respectively attached to the outer sides of the two protective films.

2. The carbon fiber and glass fiber composite board according to claim 1, characterized in that: The protective mesh layer is a coarse mesh cloth filled with a fiberglass polyurethane coating. The coarse mesh cloth has rectangular mesh holes with an aspect ratio of 3:

1. The mesh holes of each layer of coarse mesh cloth are laid at 90° intervals.

3. A carbon fiber and glass fiber composite board according to claim 1 or 2, characterized in that: The motherboard has a low and narrow rectangular step on the upper side and a shallow and narrow rectangular groove on the lower side corresponding to the upper side.

4. A carbon fiber and glass fiber composite board according to claim 3, characterized in that: The lower side of the upper shock-absorbing pad has a groove corresponding to the rectangular step on the motherboard side.

5. A carbon fiber and glass fiber composite board according to claim 4, characterized in that: The lower shock-absorbing pad has a step on its underside that corresponds to the rectangular groove on the underside of the motherboard.

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