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

Claim 2:
3. A multilayer microporous membrane or film having or exhibiting at least one of following:
(a) having at least one additive in at least one layer of the multilayer microporous membrane or film;
(b) having or exhibiting increased or improved compressibility compared to a tri-layer microporous membrane having the same thickness, Gurley, porosity, and/or resin make-up as the multilayer microporous membrane or film;
(c) having or exhibiting increased or improved elongation at break (TD) compared to a tri-layer microporous membrane having the same thickness, Gurley, porosity, and/or resin make-up as the multilayer microporous membrane or film:
(d) having or exhibiting reduced high temperature shrinkage at 150° C. compared to a tri-layer microporous membrane having the same thickness, Gurley, porosity, and/or resin make-up as the multilayer microporous membrane or film;
(e) having or exhibiting reduced high temperature shrinkage at 120° C. compared to a tri-layer microporous membrane having the same thickness, Gurley, porosity, and/or resin make-up as the multilayer microporous membrane or film;
(f) having at least one layer that comprises a polymer blend; and
(g) having a non-woven or woven attached to one or both sides of the multilayer microporous membrane or film, wherein the membrane or film has or exhibits increased or improved elongation at break (TD) compared to a tri-layer microporous membrane having the same thickness, Gurley, porosity, and/or resin make-up as the multilayer microporous membrane or film, wherein:
the elongation at break (TD) may be more than 30% higher, 35% higher, 40% higher, 41% higher, 42% higher, 43% higher, 44% higher, or 45% higher, compared to a tri-layer microporous membrane having the same thickness, Gurley, porosity, and/or resin make-up as the multilayer microporous membrane or film.