Dear Customer! You are looking for information about products from Membrana GmbH? Then you have come to the right place! Membrana is now 3M. Since the 26th of August, the separation media business, formerly owned by Polypore, belongs to 3M. 3M is a global diversified company and a leader in residential water, commercial foodservice, industrial and life science filtration. Membrana’s entire product portfolio will still be available to you, of course. Also, your previous contact persons will still be there to support you.