Corn glue for plywood

Researchers from the US Department of Agriculture (USDA) found that the corn byproduct corn germ, which is usually converted into animal feed can also be used as a protein extender for plywood glues.

Glue extenders reduce the amount of main binder, or resin, used in such glues and enhance their adhesive action, the researchers said.

Conventional extender for most plywood glues is industrial-grade wheat flour but wheat price spikes prompted the search for alternatives. The USDA said the bonding strength as well as viscosity and mixing properties of the corn-germ-based glue are comparable to that of the wheat-flour-based formula.

The researchers hope to increase the content of corn germ used in the glue to try and reduce the amount of resin needed, which would cut manufacturing costs.

2 Responses to Corn glue for plywood

  1. B.L. Cocherell 4 November, 2009 at 12:19 pm #


    How many tons of plywood glue are used in the U.S. each year?

    thanks much,

  2. Green Underworld Reporter 16 November, 2009 at 10:22 am #

    I don’t have precise numbers, but phenolic resin consumption for plywood manufacture is around a million tonnes per year in the U.S.

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