2 By 4 Wood Weight,Chocolate Glaze Wood Finish,Basic Hand Tools For Woodworking - You Shoud Know

29.11.2015, admin  
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Wood-plastic composite (WPC) products were first widely marketed in the early 1990s as weather-resistant decking. Adding wood to plastic to make WPC reduces the formula cost, raises the modulus of elasticity, and lowers the coefficient of thermal expansion.
Co-rotating extruders achieve better surface renewal of the extrudate than counter-rotating extruders and can tolerate higher wood moisture in the feed.
Reducing the wood moisture below 2% in the feed for a co-rotating extruder can actually reduce the maximum throughput, because the evolution of steam from the extrudate has a beneficial cooling effect .Counter- and co-rotating extruders can process wood fiber at moisture levels higher than 1% and 4% respectively, but at the expense of throughput. Current floors, so it's a good challenge 2 By 4 Wood Weight what you want to use the shed for after.


The exact type of wood used to make construction lumber varies depending on where you live, typically favoring what is abundant and affordable in your area. This means that the producer of WPCs is making a profile in which the constituent with the highest weight percentage in the formulation is likely to be undergoing thermally induced decomposition as it enters the extrusion die.
For decking and fence profiles, where a rough surface texture is acceptable or even desirable, screening the wood fiber to 40 to 60 mesh results in good flow characteristics and ease of mixing into the plastic matrix.For railing and other profiles requiring a smooth finish, the wood is screened to 80 to 100 mesh.
These work by improving the adhesion of the plastic matrix to the surface of the wood fiber. For counter-rotating extruders, the highest production rates are achieved when the wood fiber is dried to 1% or lower moisture content before being fed into the extruder.


The benefits of coupling agents must be weighed against increased formula cost, higher specific energy in the extruder, and reduced effectiveness of external lubrication in the profile die.The use of a capstock layer on WPCs raises the performance of the product in several ways.




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