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

Claim 8:
9. The multilayer microporous membrane or film of claim 8, wherein:
in the at least one outermost sub-membrane, the innermost micro-layer or nano-layer comprises, consists of, or consists essentially of a polyethylene blend;
the at least one outermost sub-membrane, whose outermost micro-layer or nano-layer comprises, consists of, or consists essentially of polyethylene, has an innermost micro-layer or nano-layer that comprises, consists of, or consists essentially of a polyethylene blend;
in both of the outermost sub-membranes, the outermost micro-layer or nano-layer comprises, consists of, or consists essentially of polyethylene;
in both of the outermost sub-membranes, the innermost micro-layer or nano-layer comprises, consists of, or consists essentially of a polyethylene blend;
the at least one inner sub-membrane is in direct contact with at least one of the outermost sub-membranes whose innermost micro-layer or nano-layer comprises, consists of, or consists essentially of a polyethylene blend;
the membrane or film comprises another inner sub-membrane comprising at least three nano-layers or micro-layers, wherein at least one outermost micro-layers or nano-layers of the another inner sub-membrane comprises, consists of, or consists essentially of a polyethylene blend;
the membrane or film comprises another inner sub-membrane comprising at least three nano-layers or micro-layers, wherein both outermost micro-layers or nano-layers of the another inner sub-membrane comprises, consists of, or consists essentially of a polyethylene blend;
the nano-layers or micro-layers of the outermost sub-membranes are thinner than the nano-layers or micro-layers of the innermost sub-membrane;
the nano-layers or micro-layers of the outermost sub-membranes are 2 to 5 times thinner than the nano-layers or micro-layers of the innermost sub-membrane;
the nano-layers or micro-layers of the outermost sub-membranes are 3 to 5 times thinner than the nano-layers or micro-layers of the innermost sub-membrane;
the nano-layers or micro-layers of the outermost sub-membranes are 4 to 5 times thinner than the nano-layers or micro-layers of the innermost sub-membrane;
the membrane or film comprises 10 to 35% polyethylene based on the total weight of the membrane or film; or
the membrane or film comprises 15 to 25% polyethylene based on the total weight of the membrane or film.