Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 2/13/2009
Publication Date: 5/10/2009
Citation: Hojillaevangelist, M.P. 2009. Low-Cost Soybean Protein Products as Extenders in Plywood Adhesives. Meeting Abstract.
Technical Abstract: Soybean flour and meal were evaluated as alternate protein extenders in plywood adhesives. This research is part of our laboratory’s efforts to develop new uses for the proteinaceous co-products from soybean and cereal processing. Ground soybean meal was tested as replacement for wheat flour in glues for sprayline or roll coaters, while soy flour was evaluated as substitute for animal blood protein in plywood glues for foam extrusion. Substitution was done on a protein content-basis. Glues were applied onto 30.5 cm. x 30.5 cm. Southern pine veneers that were processed into 3-ply panels and then cut into specimens for bond strength testing. The soybean meal glue had satisfactory mixing properties and bond strength nearly equal to that of the wheat flour-based control glue. The foamed plywood glue containing soy flour had good re-foaming properties and adhesive strengths that were at least equal to that of the blood-based control glue. Simple cost analysis also indicated that the soy flour-based glue was cheaper than the current blood-based foamed glue. Our findings demonstrated that soy flour and meal were viable extenders in plywood adhesives. The soy flour-based foamed plywood glue is now being used commercially by a manufacturer in the United States.