Abstract: This paper is a review of a new theory about a colloidal concept of UFresin presented with American scholars. In the paper, their evidancess aboutthe theory are introduced, as well as high strures and morphology of UF re-sin, being further support. After that, potential significances of the theory inUF resin are discussed.

Key words: Structure of UF resin, Solidification mechanism, Poeydisperse sol, Colloidalcoalesence