Technavio Announces the Publication of its Research Report – Global Polytetrafluoroethylene (PTFE) Membrane Market 2019-2023 Technavio recognizes the following companies as the key players in the global polytetrafluoroethylene (PTFE) membrane market: Danaher, Donaldson Company Inc., General Electric, Merck KGaA, and W. L. Gore & Associates Inc.