Influence of Treatment on the Gluing of Rubber Veneer

摘要

Wood destroying agents which attack wood also attack wood products. It is well known that preservation plays an important role in the use of naturally non-durable species of wood and wood products by increasing its service life: Similarly preservativetreated plywood has a greater service life. The common preservatives for composites are boric acid and borax. These compounds are effective against decay and sap staining fungi and wood destroying insects. Rubber wood (Hevea braziliensis) is a non-durable species and susceptible to fungal and insect attack quickly after sawing. It is assumed that without preservative treatment rubber wood could not be a suitable raw material for plywood and particleboard manufacture Veneer obtained both from sapwood and hardwood of nondurable timber species when used for plywood manufacture should be soaked in 1,25% solution of boric acid or 1.90% solution of borax at a temperature of 93 deg C to 100 deg C for a period of 10 to 40 minutes depending on species and thickness of the veneer (Anon. 1983). With this aim in view the present study has been undertaken.