| PATENT ASSIGNEE'S COUNTRY | USA |
| UPDATE | 09.99 |
| PATENT ASSIGNEE | This data is not available for free |
| PATENT CLAIMS |
Trilayer, shutdown battery separator making method (a) Extruding PE precursor (b) Extruding PP precursor (c) Forming a nonporous trilayer precursor having PE precursor sandwiched between 2 PP precursors (d) Simultaneously bonding & annealing the trilayer precursor to form a bonded & annealed trilayer precursor, the annealing performed at T 105-135C & comprising 2 zones at different T (e) Stretching the trilayer precursor (f) Forming battery separator |
| PATENT PHOTOCOPY | Available on request |
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