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

Claim 12:
13. The multilayer microporous membrane or film of claim 10, wherein;
the outermost nano-layers or micro-layers of the outermost sub-membranes comprise, consist of, or consist essentially of polyethylene;
the outermost nano-layers or micro-layers of the at least one inner sub-membrane comprise, consist of, or consist essentially of polyethylene;
the outermost nano-layers or micro-layers of the outermost sub-membranes comprise, consist of, or consist essentially of polyethylene, and the outermost nano-layers or micro-layers of the at least one inner sub-membrane comprise, consist of, or consist essentially of polyethylene;
the at least one inner nano-layer or micro-layer of the outermost sub-membranes comprise, consist of, or consist essentially of polypropylene, which may be a high molecular weight polypropylene;
the outermost nano-layers or micro-layers of the outermost sub-membranes comprise, consist of, or consist essentially of polyethylene, and the at least one inner nano-layer or micro-layer of the outermost sub-membranes comprise, consist of, or consist essentially of polypropylene, which may be a high molecular weight polypropylene;
the outermost nano-layers or micro-layers of the outermost sub-membranes comprise, consist of, or consist essentially of polyethylene, and the outermost nano-layers or micro-layers of the at least one inner sub-membrane comprise, consist of, or consist essentially of polyethylene, wherein the at least one inner nano-layer or micro-layer of the outermost sub-membranes comprise, consist of, or consist essentially of polypropylene, which may be a high molecular weight polypropylene.