Patent ID: 11969929
Assignee: CELGARD, LLC
Field: Chemical engineering (Chemistry)
Classification: CPC B  H  D  Y | IPC B  D  H

Claim 33:
34. A multilayer microporous membrane exhibiting an increase in puncture average (g) when tested at a high puncture speed over 25 mm/min compared to a puncture average (g) tested at 25 mm/min, wherein:
the puncture average is at least about 20 g higher at a puncture speed of 100 mm/min that at 25 mm/m in;
the puncture average is at least about 30 g higher at a puncture speed of 100 mm/min that at 25 mm/min;
the puncture average is at least about 40 g higher at a puncture speed of 100 mm/min that at 25 mm/min;
the puncture average at a puncture speed of 25 mm/min is above 250 g;
the puncture average at a puncture speed of 25 mm/min is above 250 g, and a thickness of the membrane is between 14 and 30 microns;
the puncture average at a puncture speed of 25 mm/min is above 275 g;
the puncture average at a puncture speed of 25 mm/min is above 275 g, and a thickness of the membrane is between 14 and 30 microns;
the puncture average at a puncture speed of 25 mm/min is above 300 g;
the puncture average at a puncture speed of 25 mm/min is above 300 g, and a thickness of the membrane is between 14 and 30 microns;
the puncture average at a puncture speed of 25 mm/min is above 325 g;
the puncture average at a puncture speed of 25 mm/min is above 325 g, and a thickness of the membrane is between 14 and 30 microns;
the puncture average at a puncture speed of 25 mm/min is above 350 g; and/or
the puncture average at a puncture speed of 25 mm/min is above 350 g, and a thickness of the membrane is between 14 and 30 microns.