Formaldehyde-Free Binding Systems for Wood-Based Composites
Formaldehyde is a widely used industrial chemical that is also a suspected carcinogen. Worker and end-user exposure to formaldehyde is heavily regulated by at the state and federal level by agencies including HUD, EPA, and NIOSH.
Particleboard (PB) and medium-density fiberboard (MDF) are two composite wood products that are traditionally made using formaldehyde-based adhesives. Formaldehyde vapor tends to escape during composite manufacturing and is also out-gassed to some extent from the finished products.
Description of Technology
Michigan State University’s invention is a method for preparing an adhesive system for composite wood products that is formaldehyde free. It uses a polyolefin modified with maleic anhydride to bind together wood particles into extruded boards. The technology offers a route to eliminating formaldehyde from the production process, which would improve air quality at the production sites, in the surrounding environment, and at the end-user location.
- This adhesive was shown to produce samples with comparable mechanical properties to commercially available PB and MDF produced using formaldehyde adhesives.
- The demand for environmentally friendly products continues to grow, as consumers become increasingly aware of health risks posed by traditional products.
The invention can be used to produce formaldehyde-free composite wood products, such as particleboard and fiberboard.
U.S. patent 7,605,197
Laurent Matuana, Katana Carlborn
For Information, Contact:
Michigan State University