Composite panels refer to panels composed of two or more materials. In practice, the concept and manufacturing methods of composite panels vary depending on the materials involved. In everyday applications, metal‑based composite panels, wood‑plastic composite panels, and fiberglass‑reinforced plastic composite panels are commonly used.
　　Fiberglass composite panel
　　Glass-fiber-reinforced plastic (GRP) panels come in various types, including GRP grating, flat GRP cover plates, and GRP deck plates. Their primary manufacturing process involves combining glass fiber products—such as glass fiber rovings, glass fiber mats, and mesh fabrics—with resin. Production methods include molding, hand lay-up, pultrusion, and spray-up, among others.
　　Its structural advantages are:
　　1. The interlaced weaving of glass fibers and their thorough impregnation with resin ensure maximum corrosion resistance of the grating.
　　2. The overall structure ensures uniform load distribution, helping to evenly distribute the forces on the grating and its supporting framework.
　　3. The glossy surface and the slanted grid pattern give the grille a self-cleaning effect.
　　4. The recessed surface provides the grating with anti-slip properties, and a sand‑filled surface further enhances its slip resistance.
　　Wood-plastic composite board
　　Unlike the fiberglass‑reinforced composite panels described above, wood‑plastic composite panels are made solely from wood, with no other materials involved. Loose, fragmented wood chips and thin boards are bonded together using adhesives and then laminated into solid sheets on the exterior. Because wood‑plastic composite panels tend to be of relatively lower quality, their applications are limited, primarily confined to residential settings—such as wood‑plastic wall panels, door panels, and flooring.
　　Metal composite panel
　　The production principles of metal composite panels are essentially the same: they all employ melting to fuse two or more metals of different compositions into a single structure. Common materials include aluminum alloys and stainless steels, with the primary goal of enhancing the intrinsic properties of the metal sheet. For instance, plain iron tends to rust when exposed to the environment over time; by incorporating corrosion‑resistant additives, this susceptibility can be significantly mitigated.

Honeycomb composite panels are constructed by laminating internationally popular structural foam and honeycomb core materials, offering excellent water resistance, outstanding thermal insulation, lightweight construction, and high strength. They are widely used in recreational vehicles, high-speed trains, ships, cold-chain logistics, modular cabins, outdoor camping, furniture, food processing, and other industries.