Biobonded particle boards

The production of the biobonded particle boards has been described recently in detail (1,31). Analytical results by gel permeation chromatography and ultracentrifugation have been presented in support of an in vivo and in viiro polymerization of lignin sulfonates. Besides polymerization, the lignin molecule was found to be modified by carboxylation, and this was shown by difference spectroscopy (32). The following is a short summary of pertinent results. 

Table IV. Technological and Mechanical Properties of Biobonded Particle Boards Effect of Lignin Type, Enzyme Activity and Pressing Time...

In contrast to particle boards bonded with synthetic resins, the biobonded boards do not emit any harmful vapors as do, for example, formaldehyde-bonded boards. 

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