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

Claim 28:
29. The multilayer microporous membrane of claim 28, wherein:
the middle two micro-layers or nano-layers of the two outermost sub-membranes are in direct contact with each other and on either side of the two middle micro-layers or nano-layers of the two outermost sub-membranes is one micro-layer or nano-layer comprising, consisting of, or consisting essentially of a blend comprising polypropylene and another resin; or
the middle two micro-layers or nano-layers of the inner sub-membrane are in direct contact with each other and on either side of the two middle micro-layers or nano-layers of the inner sub-membrane is one micro-layer or nano-layer comprising, consisting of, or consisting essentially of a polypropylene.