wpc decking

Additives are also often used in WPCs. Additives are
materials that are added in small amounts to enhance
properties. For example, lubricants improve surface
appearance and  processing; coupling agents improve
adhesion between the wood and plastic components. Other
possible additives include colorants, light stabilizers,
foaming agents, and thermosetting resins.
The first step in producing a WPC is to determine what raw
materials, and in what amounts, will produce a WPC that
meets the processing and  performance requirements.
Manufacturing  melt-blended composites is  usually a twostep process consisting  of compounding and  forming. In
the compounding step, wood flour or wood fiber and additives are combined with molten thermoplastic to produce a
homogeneous composite material. Three common forming
methods for WPCs are extrusion (forcing molten composite
through a die), injection molding (forcing molten composite into a cold  mold), and compression molding (pressing
molten composite between mold halves).