Using hemihydrate gypsum as main raw materials and frothing by gum rosin composite vesicant to produce gypsum heat preservingmaterial.
以建筑石膏为原料，采用松香类复合发泡剂发泡制成石膏保温材料。
2
It has the highest gas-impermeability of any plastic, about 10,000 times that of ordinary polyethylene, which makes it an excellent material for preserving food.
It introduces cement stabilized soil material from matter need attention of use-process, health preserving and primary material, which has meaning in spreading application of the structure.