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

Claim 24:
25. The multilayer microporous membrane or film of claim 20, wherein there are three or more inner sub-membranes and each of the inner and outermost sub-membranes comprise three or more micro-layers or nano-layers, and wherein:
there are three inner sub-membranes and each of the inner and outermost sub-membranes comprise three micro-layers or nano-layers;
there are three inner sub-membranes and each of the inner and outermost sub-membranes comprise three micro-layers or nano-layers, wherein the micro-layers or nano-layers of two of the inner sub-membranes each comprise, consist of, or consist essentially of polyethylene;
there are three inner sub-membranes and each of the inner and outermost sub-membranes comprise three micro-layers or nano-layers, wherein the micro-layers or nano-layers of two of the inner sub-membranes each comprise, consist of, or consist essentially of polyethylene, and wherein the nano-layers or micro-layers of one of the inner sub-membranes each comprise, consist of, or consist essentially of polypropylene;
there are three inner sub-membranes and each of the inner and outermost sub-membranes comprise three micro-layers or nano-layers, wherein the micro-layers or nano-layers of two of the inner sub-membranes each comprise, consist of, or consist essentially of polyethylene, and wherein the nano-layers or micro-layers of one of the inner sub-membranes each comprise, consist of, or consist essentially of polypropylene, and further wherein the one inner sub-membranes with nano-layers or micro-layers comprising, consisting of, or consisting essentially of polypropylene comprises a nano-layer or micro-layer comprising, consisting of, or consisting essentially of a polypropylene blend, a nano-layer or micro-layer comprising, consisting of, or consisting essentially of a polypropylene, and a nano-layer or micro-layer comprising, consisting of, or consisting essentially of a polypropylene blend, in that order;
there are three inner sub-membranes and each of the inner and outermost sub-membranes comprise three micro-layers or nano-layers, wherein the micro-layers or nano-layers of two of the inner sub-membranes each comprise, consist of, or consist essentially of polyethylene, and wherein the nano-layers or micro-layers of one of the inner sub-membranes each comprise, consist of, or consist essentially of polypropylene, and further wherein the two inner sub-membranes with nano-layers or micro-layers comprising, consisting of, or consisting essentially of polyethylene and the one inner sub-membrane with nano-layers or micro-layers comprising, consisting of, or consisting essentially of polypropylene are provided in the following order: sub-membrane with nano-layers or micro-layers comprising, consisting of, or consisting essentially of polyethylene; sub-membrane with nano-layers or micro-layers comprising, consisting of, or consisting essentially of polypropylene; sub-membrane with nano-layers or micro-layers comprising, consisting of, or consisting essentially of polyethylene;
the nano-layers or micro-layers of the outermost sub-membranes each individually comprise, consist of, or consist essentially of polypropylene only, a blend of polypropylene and another resin, or a blend of polypropylene and polysiloxane;
the nano-layers or micro-layers of the outermost sub-membranes each individually comprise, consist of, or consist essentially of polypropylene only, a blend of polypropylene and another resin, or a blend of polypropylene and polysiloxane, wherein the outermost sub-membranes comprise, consist or consist essentially of a nano-layer or micro-layer consisting of a blend of polypropylene and polysiloxane, a nano-layer or micro-layer consisting or polypropylene, and a nano-layer or micro-layer consisting of a blend of polypropylene and another resin in that order; or
the membrane or film comprises 10 to 30 wt. % polyethylene based on the total weight of the membrane or film.