W. L. Gore & Associates, Inc.

Scott J Zero

Paul D Gassler

Mark D Edmundson

Justin John Skaife

Justin J Skaife

Zachary E Lampert

Theresa Tonge

Rebecca Lynn Roehmer

Steve Emmett Minor

Paul Gassler

A filtration device containing a porous polyparaxylylene (PPX) filtration article is provided. The PPX filtration article includes at least one PPX polymer membrane layer and one or more substrate. Optionally, the PPX filtration article may include one or more support layer(s). The PPX polymer membrane has a pore size from about 1 nm to about 100 nm. The filtration article has a PVA_20 less than about 0.6 cm/mand/or a mass/area (MPA) less than about 30 g/m. The PPX filtration article separates and retains nanoparticles from a feed fluid with high permeability. In use, the PPX filtration article filters nanoparticles from a feed flow by passing the feed fluid through at least one PPX polymer membrane within the filtration article where the nanoparticles are separated and removed from the feed fluid. The PPX polymer membranes may be resistant to chemical attack, gamma radiation, and are thermally stable, biocompatible, and strong.

High flow liquid filtration device including a porous polyparaxylylene membrane or a porous polyparaxylylene/polytetrafluoroethylene composite membrane

The present invention is directed to flexible conductive articles () that include a printed circuit () and a stretchable or non-stretchable substrate (). In some embodiments, the substrate has a printed circuit on both sides. The printed circuit contains N therein a porous synthetic polymer membrane () and an electrically conductive trace () as well as a non-conducive region (). The electrically conductive trace is imbibed or otherwise incorporated into the porous synthetic polymer membrane. In some embodiments, the synthetic polymer membrane is microporous. The printed circuit may be discontinuously bonded to the stretchable or non-stretchable substrate by adhesive dots (). The printed circuits may be integrated into garments, such as smart apparel or other wearable technology.

Flexible and durable printed circuits on stretchable and non-stretchable substrates

An acoustic protective cover assembly can include a retracted membrane material traversing across an acoustic pathway defined by an opening in a housing. The retracted membrane material can include a fibril structure characterized by serpentine fibrils.

Acoustic protective cover assembly containing a retracted membrane material

A seam-sealed filter in which the seam is sealed with a seam tape comprised of an expanded fluoropolymer, such as ePTFE and copolymers thereof, having a crosswise matrix modulus of greater than 1,950 psi and an enthalpy ratio of less than 0.6 is disclosed. Such seam-sealed filters are capable of undergoing greater than 50,000 pulse-jet or reverse air cleaning cycles without substantial cracking or peeling of the sealed seam. Accordingly, the seam-sealed filters in the form of bags are particularly suitable for use in reducing particulate emissions in cement baghouses and the like.

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Newark, DE, United States of America

Scott J Zero