W. L. Gore & Associates, Inc.

Michael Wendlandt

John W Dolan

Wolfgang Bürger

Alexander Zaggl

Holger Zoudlik

Michael Adam Hall

John William Dolan

Leonard Schlichting

Burger Wolfgang

The present invention relates to a process for producing a fluoropolymer article having a high surface roughness and high coarseness which comprises the following steps: The present invention further relates to a fluoropolymer article obtainable by a process according to the invention. The present invention furthermore relates to a fiber comprising, or consisting of, a fluoropolymer having a surface roughness expressed as a peak to valley distance (Rt) greater than 10 micrometer and/or an average surface roughness (Ra) greater than 1.5 micrometer. The present invention furthermore relates to a membrane comprising, or consisting of, a fluoropolymer having a coarseness index &#x3c1;/EBP of at least 0.3, an air permeability of 15 ft/ft/min or higher and a node aspect ratio of below 25.

Processes for forming fluoropolymer articles

Fluoropolymer articles having a high surface roughness and high coarseness are provided. In one embodiment, a fiber is provided that has a surface roughness expressed as a peak-to-valley distance (Rt) greater than 10 micrometers and an average surface roughness (Ra) greater than 1.5 micrometers. In another embodiment, a membrane having a coarseness index &#x3c1;/EBP of at least 0.3 g/cm/psi and an air permeability of 15 ft/ft/min or higher is provided. The fluoropolymer articles are produced by a process that includes forming a paste-formed fluoropolymer product at a temperature lower than 50&#xb0; C., densifying the paste-formed product, and then stretching the dens Pied paste-formed fluoropolymer product in at least one direction. In exemplary embodiments, the fluoropolymer may be polytetrafluoroethylene (PTFE), a modified PTFE, a TFE copolymer, a fluorothermoplastic, a fluoroelastomer, or combinations thereof.

Fluoropolymer articles having a high surface roughness and high coarseness

The present disclosure relates to a process for the production of a thermally conductive article that includes (1) pleating a thermally anisotropic sheet having a thermal conductivity in a first plane that is higher than the thermal conductivity in a second plane perpendicular to the first plane and (2) compacting the pleated structure. An article obtained by the process, the use of the thermally conductive article for production of a device, and the device are also disclosed.

Process for the production of a thermally conductive article

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Ottobrunn, Germany

Michael Wendlandt