| 摘要 |
PURPOSE: Provided is polystyrene foam produced by using activated carbon powder, which can be used as building material for keep agreeable condition, screening electromagnetic waves, and killing insects and as food packing material for keeping food fresh. CONSTITUTION: The polystyrene foam is produced by a process comprising the steps of: stirring 50-70wt% of water, 20-30wt% of polystyrene, and 10-20wt% of the activated carbon powder; adding 10-20wt% of a foaming agent to 80-90wt% of the blended material and foaming at a temperature of 90-110deg.C for 5-8 hours under a steam pressure of 0.3-0.4kg/m¬2 by using a pressurized foaming device; storing foam particles at a temperature of 20-40deg.C for 8-12 hours to mature; applying 5-7kg/m¬2 of a vapor pressure to the matured foam particles to form; and drying the formed foam naturally for 2-4 hours.
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