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Post by troycethers on May 13, 2019 11:57:15 GMT
Porous plastic foam is on the cutting edge of insulation for vapor, heat, noise, and other elements. The two major variants of porous plastic foams are open and closed cell foams. Both types of foam are used in everyday products, but because of their structural differences, one type of foam may perform better than the other depending on the desired application.
Open vs. closed cell foam. Foam is created by dissolving gas under high pressure into a polymer while it is in a liquid state, causing the formation of thousands of tiny bubbles, or cells, in the polymer. In closed cell foam, the cells are like tiny air pockets piled together in a compact configuration, resembling inflated balloons nestled tightly together. Due to the closely packed cells, closed cell foam is vapor semi-impermeable, more rigid, able to withstand greater pressure, and is about 4 times denser than open cell foam.
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