Composite car panel and preparation method thereof

Abstract

The invention relates to a composite car panel and a preparation method thereof. The composite car panel comprises a panel core made from a thermoplastic resin material, wherein the upper surface andthe lower surface of the panel core are respectively connected with surface layers, and each surface layer is formed by laying a single or multiple continuous fiber reinforced thermoplastics resin prepreg sheet layers; the surface of the surface layer at one side is connected with an adhesive medium layer, and the surface of the adhesive dielectric layer is coated with a PUR hot melt adhesive layer; a peeling-resistant layer is laid on the PUR hot melt adhesive layer, and the adhesive medium layer is made from a porous breathable material; one surface, facing the PUR hot melt adhesive layer, of the adhesive medium layer is partially embedded into the PUR hot melt adhesive layer, and one surface, facing the continuous fiber reinforced thermoplastics resin prepreg sheet layer, of the adhesive medium layer is partially embedded in the continuous fiber reinforced thermoplastics resin prepreg sheet layer. The composite car panel not only has relatively high anti-scratch performance, anti-aging performance and wear resistance, but also has low water absorption performance, and ensures the overall strength and impact resistance of the composite car panel.

Description

technical field [0001] The invention relates to a composite material compartment plate and a preparation method thereof. Background technique [0002] With the improvement of people's living standards and changes in consumption concepts, more and more vans are used for urban express and logistics transportation. The current box panels of vans mainly use metal panels such as corrugated steel panels, corrugated panels, aluminum panels, and flat steel panels, or thermosetting composite sandwich panels such as plastic honeycomb panels, aluminum honeycomb panels, and foam panels. The overall weight of the compartment leads to higher fuel consumption of ordinary oil trucks, while for new energy trucks, the cruising range of the battery will be greatly reduced. In addition, since the surface of the metal compartment plate is often painted, it will In a rainy environment, the paint surface is easy to fall off and it is difficult to repair, resulting in a decrease in the strength of...

AI Technical Summary

Problems solved by technology

The current box panels of vans mainly use metal panels such as corrugated steel panels, corrugated panels, aluminum panels, and flat steel panels, or thermosetting composite sandwich panels such as plastic honeycomb panels, aluminum honeycomb panels, and foam panels. The overall weight of the compartment leads to higher fuel consumption of ordinary oil trucks, while for new energy trucks, the cruising range of the battery will be greatly reduced. In addition, since the surface of the metal compartment plate is often painted, it will In a rainy environment, the paint surface is easy to fall off and it is difficult to repair, resulting in a decrease in the strength of the metal box panel and a significant drop in impact resistance. In addition, during the loading and unloading process, it is easy to bump into the metal box panel, resulting in uneven surface of the metal box panel. Unevenness, over time, the metal box panel will be damaged due to stress concentration at the uneven place; for the thermosetting composite sandwich panel, although it can reduce weight, because more adhesives will be used during the processing of the thermosetting composite sandwich panel, Therefore, there will be a heavy smell, and in the process of use, its impact resistance is poor, it is difficult to repair after damage, and it cannot be recycled after exhaust gas, which will cause pollution to the environment

[0003] Patent 2016209970084 discloses a reinforced spare tire cover for the trunk of a car, including a PP honeycomb core layer and surface layers on both sides thereof, the surface layer including a glass fiber reinforced PP composite material layer and a non-woven fabric layer, each side layer The glass fiber reinforced PP composite material layer is in contact with the PP honeycomb core layer, while the non-woven fabric layer is located on the outer surface as the surface layer in direct contact with the object. Since this layer of non-woven fabric mainly plays the role of decoration and beauty, its The thickness is relatively thick. Therefore, when the spare tire cover of this structure is applied to the compartment panel of the truck compartment, the non-woven decorative surface will be scratched due to long-term loading and unloading, and the non-woven decorative surface will be scratched due to long-term sun and rain. The surface is easy to absorb more water, so it is easy to damage the non-woven decorative surface, so that the non-woven decorative surface is easy to peel off the glass fiber reinforced PP composite material layer, resulting in the exposure of the glass fiber reinforced PP composite material layer, damaging the board and reducing the durability of the board. Strength and impact resistance

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