Celgard polypropylene membrane sheet

The present invention is directed to a shutdown, bilayer battery separator and a process for making the same. A first microporous membrane with shutdown capability and a second microporous membrane with strength capability are joined together in face-to-face contact.

[0037] In the Examples below, various samples of Celgard® 2500 microporous membrane (Celgard® 2500 is a microporous monolayer polypropylene membrane that is about 25 microns thick) were used as the control samples. As the experimental samples, various samples of Celgard® 2500 microporous membrane were treated by vacuum plasma depositing ... Details about Monolayer Polypropylene PP Separators Celgard 2340 For ... Cloth Screen Filter Square Sheet . ... Polypropylene Membrane Filter,150mm,1 Micron,Made From ...

Membrane Separations. Plate-and-Frame Membrane System. Consists of layers of membranes separated by corrugated structural sheets, alternating layers with feed material flowing in and retentate flowing out in one direction, while permeate flows out in the other direction. Membrane Separations. Spiral-wound module. Membrane Separations. Spiral ... [0037] In the Examples below, various samples of Celgard® 2500 microporous membrane (Celgard® 2500 is a microporous monolayer polypropylene membrane that is about 25 microns thick) were used as the control samples. As the experimental samples, various samples of Celgard® 2500 microporous membrane were treated by vacuum plasma depositing ...

Studies done by Hill234 and Feldman and Verville235 showed superior performance of NiCd batteries with Celgard microporous polypropylene separators as compared to cellophane. The authors attribute this improvement to the better chemical and thermal stability of the polyolefin sheet membrane. All of our membrane manufacturing processes involve an extrusion process. To produce our flat sheet and hollow fiber membranes, we use one of three basic membrane processes that begin with an extrusion step. These include phase separation (thermally-induced, solvent-induced, or reaction-induced), "dry stretch", and extrusion/extraction processes. Polypropylene (PP) is a member of the environmentally-friendly polyolefin family. Like its sister, HDPE, polypropylene’s electrical properties, chemical and temperature resistance making polyproylene sheets a terrific choice for many industrial applications.