Free formaldehyde content in resin is reduced through beetle modification, and the toxicity is thus reduced. The toughness of resin has been increased after adding modifier.

Primary factor analysis was used in this paper to analyze the factors which affect the main index such as free CH2O content, shear strength, solids content and stability.

The synthetic technology of UF resins under weak acidity condition could reduce the production cost and produce UF resin adhesive with excellent performances.