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

Claim 0:
1. 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 elasticity at or above 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, and optionally wherein:
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis, is greater than −0.6 at 150° C.;
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis, is between −1.0 and −0.6 at a temperature between 175° C. and 200° C.;
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis, is between −0.9 and −0.6 at a temperature between 175° C. and 200° C.;
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis is between −0.8 and −0.6 at a temperature between 175° C. and 200° C.;
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis is between −0.7 and −0.6 at a temperature between 175° C. and 200° C.;
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis, is above −1.2 at temperatures at or above 200° C.;
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis is above −1.0 at temperatures at or above 200° C.; or
tan(delta) of the membrane or film, when measured according to dynamic mechanical analysis is above is above −0.8 at temperatures at or above 200° C.