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Expanded PTFE

Newer fabrics, not in common use but in development, test, and field trials, are described for higher temperature applications by Reference [50]. Application to 400°F—2100°F are potentially available using ceramic fibers Nextel 312 , laminated membrane of expanded PTFE on a substrate, polyimid fiber P-84, Ryton polyphenylene sulfide, and woven fiberglass. The heat and acid resistance of these new materials... [Pg.274]

The filtrate that is back-pulsed from the dome first expands the filter socks thereby cracking the cake. The movement of the socks and the subsequent liquid flow through them serves to dislodge the filter cake solids from the GORE-TEX membrane surface. Because of the expanded PTFE material of the membrane, the cake releases from... [Pg.293]

C. Baquey, F. Palumbo, M.C. Porte-Durrieu, G. Legeay, A. Tressaud, R. d Agostino, Plasma-treatment of expanded PTFE offers a way to a biofunctionalization of its surface, NIM Nucl. Instmm. Methods Phys. Res. B 151 (1999) 255-262. [Pg.405]

Fig. 12.27. Expanded PTFE micrograph (Microtex Membrane at 500x) showing a porous structure containing nodes interconnected by fibrils. (Courtesy Menardi-MikroPul, LLC.)... Fig. 12.27. Expanded PTFE micrograph (Microtex Membrane at 500x) showing a porous structure containing nodes interconnected by fibrils. (Courtesy Menardi-MikroPul, LLC.)...
Poly(tetrafluoroethylene) (PTFE), more commonly known as Teflon (DuPont) and Goretex (expanded PTFE), is found in vascular grafts. The polymer has exceptionally good resistance to chemicals. [Pg.329]

Figure I l.l I SEM micrograph of expanded PTFE fitter with a 0.45 Jjim pore size (courtesy of W. L Gore and Associates) showing the pore structure that allows the passage of water vapour. Figure I l.l I SEM micrograph of expanded PTFE fitter with a 0.45 Jjim pore size (courtesy of W. L Gore and Associates) showing the pore structure that allows the passage of water vapour.
Microporous expanded PTFE membrane"(ePTFE), ion conductive... [Pg.229]

Microporous expanded PTFE membrane (ePTFE), ion conductive membrane, 229, 271 Grafil fibers Carbon fiber, 165 Grafoil ... [Pg.556]

H. Martz, R. Paynter, S. Benslimane, G. Beaudoin, R. Guidoin, J. Borzone, H. Bensimhon, R. Satin, N. Sheiner, Hydrophilic micro-porous polyurethane versus expanded PTFE grafts as substitutes in the carotid arteries of dogs—a limited study, J. Biomed. Mater. Res. 22(1988)63-69. [Pg.325]

The company W.L. Gore Associates (EUcton, MD) develops membranes under the name Gore-Select consisting of a microporous stretched PTFE (expanded PTFE porous sheet) membrane filled with perfluorinated ionomer. The micro-porous PTFE matrix provides the mechanical strength, and... [Pg.590]

There are fabrics made of 100% high-strength expanded PTFE fibres that are extremely useful in the building sector. Fluoropolymer fabrics are naturally stain resistant and easy to clean and have an expected lifetime of around 25 years with 15 years full warranty. The fabric elements have to be sewn together or joined by means of special fluoropolymer adhesive foils. These architectural fabrics combine exceptional textile qualities with... [Pg.57]

Gore-Select membrane is a recent innovation that is useful for fuel cells. The membrane is made by filling the pores of Gore-Tex (expanded PTFE) with a per-fluorinated ionomer Hke Nafion. The resulting membrane is about 20 pm thick, about one tenth the thickness of a Nafion membrane, and it has about half the resistance of Nafion. Membrane-electrode assembhes are made by applying platinum black coatings (0.3 mg/cm ) to both surfaces. They are reported to perform well in fuel cells [46]. [Pg.299]

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See also in sourсe #XX -- [ Pg.5 , Pg.11 , Pg.14 , Pg.27 ]

See also in sourсe #XX -- [ Pg.151 ]



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