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Wood-plastic composite. Wood–plastic composites (WPCs) are composite materials made of wood fiber/wood flour and thermoplastic(s) such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), or polylactic acid (PLA). In addition to wood fiber and plastic, WPCs can also contain other ligno-cellulosic and/or inorganic filler materials.
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
Plastic lumber is composed of virgin or waste plastics including HDPE, PVC, PP, ABS, PS and PLA.The powder or pellets are mixed to a dough-like consistency at roughly 400 °F (204 °C) and then extruded or molded to the desired shape.
Although composite lumber may resist these marring effects better than other materials, it will still show signs of wear over time. Composite lumber often has a plastic-like or synthetic appearance. Although manufacturers do mold the product with a wood grain or brush stroke pattern, some consumers simply do not like the artificial sheen. [3] [4]
With a high strength-to-density ratio, HDPE is used in the production of plastic bottles, corrosion-resistant piping, geomembranes and plastic lumber. HDPE is commonly recycled, and has the number "2" as its resin identification code. In 2008, the global HDPE market reached a volume of more than 30 million tons. [2]
The Ashland/Northern States Power Lakefront Superfund site is a contaminated region of the Wisconsin shoreline of Lake Superior that is being studied for remediation by Northern States Power Wisconsin (NSPW), as well as the Environmental Protection Agency (EPA), the Wisconsin Department of Natural Resources (WDNR). [1]
Medium-density polyethylene (MDPE) is a type of polyethylene defined by a density range of 0.926–0.940 g/cm 3. [1] It is less dense than HDPE, which is more common.. MDPE can be produced by chromium/silica catalysts, Ziegler-Natta catalysts or metallocene catalysts.
As of 2018, "West Fraser has become the largest lumber manufacturer in North America with 8,600 employees globally – about 5,000 in Western Canada – at about 50 locations." [ 4 ] In April 2020, it was revealed that Canadian business magnate Jim Pattison had upped his stake in West Fraser to 13.8% ownership, prompting speculation that the ...