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Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
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Evaluation of Various Fire Retardants for Use in Wood Flour/Polyethylene Composites

Oxygen index test of a wood-plastic composite. Forest Service
Oxygen index test of a wood-plastic composite. Forest Service
Snapshot: Wood-plastic composites (WPCs) represent a class of materials increasingly used in residential construction and furniture-making. The fire performance of WPCs is not well understood, however, and there is little information regarding the effectiveness of various fire retardants in the public domain. FPL scientists used oxygen index and cone calorimeter tests to characterize the fire performance of wood flour-polyethylene composites, and compared the results with unfilled polyethylene and solid wood.
Summary:

Wood-plastic composites (WPCs) represent a class of materials increasingly used in residential construction and furniture-making. The fire performance of WPCs is not well understood, however, and there is little information regarding the effectiveness of various fire retardants in the public domain. FPL scientists used oxygen index and cone calorimeter tests to characterize the fire performance of wood flour-polyethylene composites, and compared the results with unfilled polyethylene and solid wood. Five additive-type fire retardants were then evaluated for effectiveness on fire performance. Generally, magnesium hydroxide and ammonium polyphosphate improved the fire performance of WPCs the most while a bromine-based fire retardant and zinc borate improved fire performance the least. Manufacturers of WPCs can use this knowledge to improve the fire performance of their product and expand into new markets. WPCs consume under-valued woody biomass, increasing the production of WPCs will add value to biomass. This research was conducted as collaboration between scientists at FPL in the Engineered Composites Science research work unit and the Durability and Wood Protection research work unit and the University of Wisconsin-Madison Department of Mechanical Engineering.
Princpal Investigator(s):
 Stark, Nicole M.
 White, Robert H.


External Partners:
  • University of Wisconsin-Madison Department of Mechanical Engineering.

Fiscal Year: 2010
Highlight ID: 161
 
Related Research Emphasis Areas: