Abstract: With poplar wood powder as raw material, the liquefied resin was prepared by liquefaction experiment system and then the resin was used to foam by low temperature foaming system. In addition,the effects of foaming temperature, viscosity and solid mass fraction of resin, surfactant, curing agent and foaming agent dosage and kinds on preparation process were studied. The results showed that the appropriate viscosity of resin was about 6 000 mPa/s with the solid mass fraction of 75% and the foaming temperature was set at 75 ℃, with Twain-80 and OP-10(mass ratio of 1:1) as surfactant, n-pentane as foaming agent and 1,4-butyrolactone as curing agent at the dosages of 8%-12%. Under these conditions, the foaming process was stable and the pore of foaming material was fine and even. What's more, the foaming material had high percentage of close area, good surface quality, low density(0.12-0.16 g/cm³) and high foaming ratio(5-8).

Key words: poplar liquefication, foaming material, production process