Abstract:

This paper briefly reports the prodUction and trial of manufacturing GradeⅠ plywood by using the mixed glue solution that is made from the Phenol-Formaldehyde Resin in which Larix ssp tanning extract is added as a modifier, and discusses the effects of the solution concentraction of the tanning extract, the amount of auxiliary, the molar ratio of PF, the condensation limit, the mixing ratio, the heat-pressing condition etc on the viscosity of glue solution, stability, gluing quality, in general ourline.The results showed that the quality of the produced Grade Ⅰ plywood fulfil the standard requirement and greatly lower the cost of the glue.

Key words: Tanning Extract, Modifier, Mixting Ratio, Plywood, Gluing Strength