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Title: Formaldehyde Emmission from ULEF0 and NAF-Bonded commercial Hardwood Plywood as Influenced by temperature and Relative Humidity

Source: Proceedings of the International Convention of Society of Wood Science and Technology and

Author(s)Frihart, Charles R.; Wescott, James M.; Birkland, Michael J.; Gonner, Kyle M.

Publication Year: 2010  View PDF »

Category: Conference Proceedings
Associated Research Project(s):   FPL-4707-2A

Abstract: It is well documented in the literature that temperature and humidity can influence formaldehyde emissions from composite panels that are produced using urea-formaldehyde (UF) adhesives. This work investigates the effect of temperature and humidity on newer, ultra-low emitting formaldehyde urea formaldehyde (ULEF-UF) and no-added formaldehyde (NAF) adhesives. A modified version of the EN 717-3 method to collect formaldehyde coupled with the acetyl-acetone method to quantify formaldehyde emissions was used. Formaldehyde emissions from a commercial CARB phase II compliant hardwood-plywood panel bonded with a ULEF-UF resin increased greatly when panels were exposed to higher heat and humidity. Furthermore, the rate of emission for ULEF-UF panels increased with longer exposure at 100% humidity. In contrast, formaldehyde emissions from CARB phase II compliant hardwood-plywood bonded with a NAF resin were relatively stable at different temperature and relative humidity conditions and decreased over time. This work highlights the potential for long-term formaldehyde emissions from the new ULEF-UF, CARB phase II compliant resin systems.

Keywords: Formaldehyde, plywood, adhesives, glue, temperature, humidity, composite materials, environmental monitoring, air pollution, measurement, hardwoods, soybean glue, heat, emissions, gluing, exposure tests, ASTM E 1333, thermal degradation

Publication Review Process: Informally Refereed (Peer-Reviewed)

File size: 251 kb(s)

Date posted: 11/15/2010

This publication is also viewable on Treesearch:  view
RITS Product ID: 38970
Current FPL Scientist associated with this product
Frihart, Charles R.
Research Chemist

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