Loading patent…
AssigneeAmtek Research International LLC
InventorsRichard W. Pekala, Don Spitz, Weston Wood, Matt Warren, Doug Atkinson, John Norris, Chi La
Estimating the term…
A multilayer microporous polyolefin film in which at least one layer is highly filled with inorganic particles such that the film exhibits good in-plane dimensional stability (i.e., low shrinkage) at temperatures both above and below the melting point of the polymer matrix is disclosed herein. A second extruded polyolefin layer is chosen such that its porosity and the overall permeability of the multilayer film will decrease above the melting point of the polymer matrix. The layers of the multilayer film are cohesively bonded and such films can be used as separators to improve the manufacturability, performance, and safety of energy storage devices such as lithium-ion batteries.
A multilayer freestanding, microporous polyolefin film, comprising:
3-4. (canceled)
A method of making a multilayer freestanding, microporous polyolefin film, comprising:
Dependencies are inferred from the claim text.