Technology of low-temperature production of plywood bonded with modified phenol-formaldehyde resin.

摘要

Technology of low-temperature veneer gluing in the manufacture of phenol-formaldehyde (PF) plywood has been investigated. The research on modification of PF resins by various chemical compounds (resorcinol, melamine, urea, para-formaldehyde, hydrogen peroxide, dichromate ammonium, potassium and sodium) has been done. Such modification gives a possibility to make plywood at reduced pressing temperature of 100 degrees C in comparison with the usual temperatures of 120-130 degrees C. The low-temperature pressing results in a significant energy saving process in comparison with high-temperature pressing, without any worsening of mechanical properties of plywood.