Banner for LabNotes
From Lab Notes
Contact Information
Forest Products Laboratory
One Gifford Pinchot Drive
Madison, WI 53726-2398
Phone: (608) 231-9200
Fax: (608) 231-9592
Email

 

You are here: FPL Home  / Information Products & Services  / Publications

Requested Product

Title: Coating WPC's using co-extrusion to improve durability

Source: Proceedings : Coating Wood and Wood Composites : Designing for Durability, July 23-25, 2007, Seattle, WA. [S.l. : s.n.], 2007: Pages 1-12

Author(s)Stark, Nicole M.; Matuana, Laurent M.

Publication Year: 2007  View PDF »

Category: Journal Articles

Abstract: Wood-plastic composites (WPCs) have been gaining market share in the residential construction industry as lumber for decking, roof tiles, and siding. The durability of these materials in exterior environments is just beginning to be understood. Current research suggests that controlling moisture absorption by the composite is key to improving durability. Methods to improve moisture resistance of WPCs have met with limited success. Co-extrusion involves the simultaneous extrusion of two dissimilar materials as a single profile. In this study, co-extrusion was used to improve the moisture resistance, and in this manner, the durability of WPCs. We manufactured a material with a WPC base coated with a clear plastic cap layer of either high-density polyethylene or polypropylene. The co-extruded composites and corresponding WPCs without a plastic coating were tested for moisture absorption and weathering performance. The cap layer co-extruded over a WPC provided improved moisture resistance compared with the control WPC. Co-extrusion of WPCs with a clear plastic cap layer did not provide protection against changes in mechanical performance. However, composites capped with high-density polyethylene exhibited some resistance to color change.

Keywords: Color fading, plastics, extrusion, polypropylene, polyethylene, weathering, composite materials, deterioration, mechanical properties, moisture, wood-plastic composites, discoloration, co-extrusion, wood-plastic materials, durability

File size: 286 kb(s)

This publication is also viewable on Treesearch:  view
RITS Product ID: 25164
Current FPL Scientist associated with this product
Stark, Nicole M.
Research Chemical Engineer
  

Additional items that might interest you
View the video celebrating FPL's 100 years of public service in 2010, from the producers of the Greatest Good....view

Research Highlights from FPL....view

Termite Eradication: A search for the Holy Grail.... view

Moisture Management in Residential Construction Series videos...view

Wood Floor Systems in Residential Construction Series videos....view
- FPL's Mission and Strategic Plan -

FPL's mission is to identify and conduct innovative wood and fiber utilization research that contributes to conservation and productivity of the forest resource, thereby sustaining forests, the economy, and quality of life. ... ..more »

- FPL Research Emphasis Areas -
Advanced Composites

As an integral part of the FPL mission, we improve the long-term sustainability of our Nation's forests by creating valuable composite products from biobased materials ... ..more »


Advanced Structures

The FPL has been in the forefront of wood-frame housing research since 1910 and has long been recognized as a world leader in such housing-related areas as engineered wood ... ..more »


Forest Biorefinery

We all know the compelling reasons that the United States needs to reduce its dependence on fossil fuels. Historically, the greatest increases in energy demand have been for transportation fuels ... ..more »


Nanotechnology

A leader in wood products research for over a century, the FPL is positioning itself to become the lead Federal research facility for the application of nanotechnology in forest products ... more »


Woody Biomass Utilization

Forests in the United States contain a substantial amount of small-diameter, overstocked, and underutilized material.FPL research projects are exploring the potential of the small-diameter ... ..more »