Worth to mention that "liquid wood" definition has gained popularity in Russia becoming one of the most used synonym of traditional WPC.
It is not known for certain who introduced the term. Supposedly, it could be used in a professional field since the very beginning of development and/or industrial production of wood composites. However, judged by the Internet citing, "liquid wood" came into consumer language only in the late 1990s, when WPC market entered in a new cycle of its dramatic growth.
The fact that conventional wood and synthetic thermoplastic based WPC is practically not referred to as "liquid wood" in the US and Europe indirectly speaks for the assumption that the term was introduced exactly that time by European developers of bioplastic WPCs based on natural polymers (starch, maize, lignin), such as Fasalex, Technaro, who make natural wood liquid without using of synthetic components, thus, obtaining real natural "liquid wood".
Why is wood «liquid»?
In the course of either of the above production processes WPC dry blend (or pellet) is hit and melt into viscous liquid which is extruded through a die/mold or fills in a press-mold, being shaped into WPC lumber profile (e.g. decking) or WPC molded product (e.g. flowerpot) after cooling.
It is this ability of WPC to turn into viscous liquid and be consequently molded into varied shapes that made wood plastic composite to be sometimes referred to as "liquid wood".
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