3M completed its acquisition of the assets and liabilities associated with Polypore’s Separations Media business from Polypore International Inc. for a purchase price of $1.0 billion.   Polypore’s Separations Media business has annual global sales of approximately $210 million. Polypore’s Separations Media business is a leading provider of membranes and modules for blood treatments, ultrafiltration and gas transfer in the life science, electronic, industrial and specialty segments. Adding Poly...