At-line validation of a process analytical technology approach for quality control of melamine-urea-formaldehyde resin in composite wood-panel production using near infrared spectroscopy.

摘要: The reactivity of melamine-urea-formaldehyde resins is key importance in the manufacture engineered wood products such as medium density fibreboard (MDF) and other composite products. Often MDF manufacturing plant has little available information on resin than details specification at time batch manufacture, which often occurs off-site a third-party plant. too, fresh delivery mixed with variable volume aged storage tanks, thereby rendering any obsolete. It therefore highly desirable to develop real-time, at-line or on-line, process analytical technology monitor quality prior panel manufacture. Near infrared (NIR) spectroscopy been calibrated against standard methods 13C nuclear magnetic resonance (NMR) measures molecular composition order provide (PAT), quality, particularly formaldehyde content resin. At-line determination was made possible using six-factor calibration an R2(cal) value 0.973, R2(CV) 0.929 root-mean-square error cross-validation 0.01. This then used generate control charts regular four-hourly periods during commercial