Method for preparing the light-weight composite for the EMI shielding and deodorizing using the carbon impregnated polyurethane foam

摘要

PURPOSE: Provided is a method for producing a light-weight, carbon-deposited polyurethane foam composite having both of electromagnetic shielding and deodorizing effects. CONSTITUTION: The method comprises depositing a mixture consisting of carbon material such as conductive carbon, active carbon, and charcoal, deposition reagent such as potassium iodide, and binder based on water glass, to polyurethane foam formed from polyurethane polymer substrate. The mixture consists of 20-90% of carbon material, 5-20% of binder, and 1-10% of deposition reagent. The method comprises the steps of (i) drying the carbon material at 110 deg.C for 12 hours or more, (ii) mixing the carbon material into the binder and deposition reagent for 1-3 hours, (iii) depositing the mixture to polyurethane foam at ambient temperature, and (iv) drying the deposited mixture at 100 deg.C for 12 hours or more.