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

Claim 29:
30. The multilayer microporous membrane or film of claim 27, wherein:
the micro-layers or nano-layers all have the same thickness;
the micro-layers or nano-layers do not all have the same thickness;
each of the sub-membranes is formed by co-extrusion;
each of the sub-membranes is formed by co-extrusion, wherein each of the co-extruded sub-membranes are laminated to at least one other co-extruded sub-membrane to form the multi-layer microporous membrane; or
the membrane or film comprises 10 to 35 wt. % or 15 to 25 wt. % polyethylene based on the total weight of the membrane or film.