Wood Adhesive Properties

Polarity

Wood-based polar substances have partially unsaturated polar genes on the surface. Only when adhesives also carry polar genes can they cause heterogeneous genes to attract each other and produce firm adhesion to the surface of the wood.

Proper wettability

That is, the adhesion and diffusion effect on the surface of wood and other objects. The wettability of glue is related to its surface tension and cohesion. The smaller the surface tension, the smaller the cohesion and the greater its adhesion and diffusion. Otherwise, the smaller. However, if the wettability is too high, it is easy to be absorbed by the wood, resulting in lack of glue and excessive glue consumption. Different glue materials should adopt the corresponding concentration and viscosity.

Proper pH (pH)

Strong acids and strong alkaline adhesives will damage the mechanical properties of wood, especially strong acids.

Appropriate molecular weight and molecular weight distribution

Adjusting (or designing) the required molecular weight range and molecular weight distribution for different uses of the adhesive can improve the adhesive strength and accelerate the curing.