What Is Wood Plastic Composite (WPC)?

Wood-plastic composites (WPCs) are composite materials composed of wood elements combined with plastic fibers. WPC can be made entirely from recycled materials and plastic powder obtained from wood product manufacturing facilities. Also known as composite wood, WPC is widely used to build outdoor deck floors, prefab homes, park benches, door frames, and indoor and outdoor furniture. This article explains the manufacture, features, and benefits of WPC in construction.

Manufacture of Wood Plastic Composites (WPC)

Wood-plastic composites are made by thoroughly mixing ground wood particles with heated thermoplastic resin. Finally, the entire mixture is extruded into the desired shape. Commonly used thermoplastic resins are polystyrene (PS), polylactic acid (PLA), and polypropylene (PP).

Mixing and extrusion processes vary by manufacturing facility. WPC contains organic raw materials and needs to be processed at lower temperatures than traditional plastic composites to facilitate extrusion and injection molding. The ratio of wood to plastic in the composite determines the melt flow index (MFI) of WPC. Larger amounts of wood result in lower MFI.

Characteristics of Wood Plastic Composites (WPC)

WPC is made up of a combination of substances prepared in a paste-like texture. Therefore, they are molded into any desired shape and size.

WPC can be dyed or tinted to match the desired design specifications.

Compared to regular wood, WPC is both aesthetically and overall durable because this composite material resists moisture and corrosion.