Formaldehyde elution particleboard

Interpretation for Comminuted Systems. The similarities and differences noted for the kinetics of formaldehyde removal from UF and PF particleboards and from formaldehyde-sorbed wood are brought out more clearly by plotting relative formaldehyde losses versus time. Loss ratios, i.e., formaldehyde loss by any material divided by the UF board loss at the same time, are shown in Figures 10 and 11 included in Figure 10 are analogous ratios for resin data from formaldehyde liberation (weighing bottle test) and formaldehyde elution by toluene experiments (10). Examination of the data leads to the following additional comments ... 

Figure 3. Urea-formaldehyde particleboard elution by nitrogen relative humidity (RH) effects. (0.4 NCM. P as in Figure 1.) (ML85 5430)...

Resin Effects on Gas Elution. Elution experiments were also performed on PF-bonded particleboard and on Southern pine chips (furnish without resin) that had sorbed formaldehyde via room temperature vapor phase equilibration (see Appendix Id and 2). Points to be noted here are as follows ... 

Figure 5. Phenol-formaldehyde particleboard elution by nitrogen at different relative humidities (RH). (0.5 NCM. P as in...

Figure 10. Formaldehyde loss ratios at 20 percent relative humidity for various materials. (Formaldehyde removed from a material divided by that removed from urea-formaldehyde particleboard. Board elution by nitrogen. Resin liberation by weighing bottle test. PF = phenol-formaldehyde) (ML85 5437)...

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