Low-poisonous and Water-resistant Urea-formaldehyde Resin Adhesive for Plywood.

This article deals with the effects of the molecular ratio of urea and formaldehyde,the used amount of melamine modifier on the synthesized resin properties in the process of urea-formaldehyde resin. In addition,the adhesive properties are increased when an accessory ingredient of polyvinyl acetate is added to the adhesive,and a low-poisonous,water-resistant and strengthened urea-formaldehyde adhesive is presented.