W. L. Gore & Associates, Inc.

Bernadette Heller

Alexander Zaggl

Donald L Hollenbaugh, Jr

Gopalan V Balaji

Rebecca Buxbaum

Andre Hartmann

Donald L Hollenbaugh

Polytetrafluoroethylene (PTFE) composite articles that have a macro textured surface. The composite articles include at least two different PTFE membranes in a layered or stacked configuration. The composite article has a macro textured surface characterized by a plurality of strands raised from the surface of the PTFE membrane. The strands may be formed of either interconnected nodes of PTFE or of at least one nodal mass of PTFE and have a length equal to or greater than about 1.5 mm. The macro textured surface provides a topography to the first PTFE membrane. The composite articles have a bubble point from about 3.0 psi to about 200 psi, a thickness from about 0.01 to about 3.0 mm, and a bulk density from about 0.01 g/cmto about 1.0 g/cm.

Asymmetric polytetrafluoroethylene composite having a macro-textured surface and method for making the same

The present invention relates to a process for the formation of a structured film, a structured film as such, an article comprising the structured film, a device for the continuous formation of such a structured film and a composite comprising the structured film.

Process for the production of a structured film

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Taufkirchen, Germany

Bernadette Heller