Wood-plastic composite
From MaterialProject.org, the free architectural material catalog
Contents |
Material analysis
Wood-Plastic Composite is a material made from recycled plastic and wood scraps and resembles wood. The plastic protects the wood fibers from decay and decomposition while the wood fibers add strenght. It can be used in place of wood in many instances, resisting the wear that wood experiences over time. WPC can be heavier than wood and can flex in extreme heat.
Applications
- Decking
- Railing
- Fencing
- Floor Board
- Pallet
- Trim
- Roofing
- Siding
- Recreational bridges
- Marine uses
- Outdoor Furniture
Design Trends
- Use in windows, siding, roofing and foundations to prevent rotting
Finish and aesthetic qualities
- It can be left untreated or can be painted or stained after installation.
Surface forms / shapes
- rectangular planks, resembling traditional wood
Standard Dimensions
- 2ft. x 6ft
Price per Square Foot
- $2/linear foot
Material properties
Primary Structural Use
- Some use as foundation elements
Material performance
- The lumber resists decay, does not splinter, and is straight. Compared to plastic lumber, it is more resistant to warping.
- There is no need for sealing [1]
Opening Restrictions
Manufacturing Process/Composition
Wood-plastic composite products are made of a combination of wood and plastic fibers, usually in a 50:50 ratio. The plastic and wood fibers come from reclaimed or recycled resources, including sawdust and used pallets from woodworking operations, and recycled plastic grocery bags from all over the country.
Special Installation Issues
- Recycled wood/plastic composites are commonly used to replace dimensional lumber in exterior decking and moldings, doorjambs, playground equipment, fencing, and other applications where durability is an important performance attribute. The material can typically be worked and installed using common carpentry tools. Both screws and nails with a hot-dipped galvanized coating are acceptable fasteners. Because there is no grain, pre-drilling is typically not required for self-drilling screws. Pneumatic nailers also work exceptionally well. A circular saw equipped with a carbide blade (preferably with a thin kerf and heat vents) provide very clean cuts. When installed as decking material, wood/plastic composite board should be spaced a minimum of 1/8" apart [2].
Maintenance
For general cleaning, use composite decking cleaner and water. There is never a need for sanding, sealing or painting.
Environment and Life Safety
Environmental impact
- By eliminating or reducing the amount of virgin materials used in production, and by making use of existing materials when it is manufactured, recycled wood-plastic composite lumber contributes to the efficient use of resources. In addition, the wood does not contain harmful materials.
Flammability Rating
- Fire retardancy and other properties go to Trex Technical information. This is only for wood-plastic composite made by Trex
Coefficient of Friction
- For abrasion and other properties go to Trex Technical information. This is only for wood-plastic composite made by Trex
References
Notes
- ↑ www.trex.com
- ↑ http://www.toolbase.org/Technology-Inventory/Decks-Patios-Fences/recycled-composite-lumber
Student contributions
- Sarah Smith, Spring 2010
External links
Additional resources
Perth - Chinese wood-plastic composite manufacturer
http://www.structuremag.org/article.aspx?articleID=450
http://www.forestprod.org/woodfiber05wolcott.pdf
http://www.fpl.fs.fed.us/documnts/techline/wood-plastic-composites.pdf
