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To prepare the sheet-form microporous membrane at American Membrane Corporation, we have adapted a unique process termed "phase inversion process." In the process, organic polymers are first dissolved in an appropriate solvent system with or without the additives, cast onto a stainless steel belt with a precise control of thickness, and precipitated to form a porous nascent membrane either through a solvent evaporation or a non-solvent addition process.
The microporous membrane is then washed with appropriate solvents to remove the residuals present in the membrane and finally dried. The process flow chart shown below outlines the membrane sheet manufacturing procedure:
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