Apertured polymer sheets incorporating nanoparticles
AssigneesDelStar Technologies, Inc., LMS Technologies, Inc.
InventorsAndrew G. Platt, Lenny Pompeo
Life of this patent
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Abstract
Apertured polymeric layers, sheets, mesh or films are provided for a variety of different applications. A polymeric sheet comprises at least one polymer layer having one or more apertures for flow of gas or liquid therethrough, and a plurality of nanoparticles disposed within the polymer sheet such that the nanoparticles are disposed between a first surface of the polymer sheet and a second surface opposite the first surface. The nanoparticles filter contaminants passing through the polymeric sheet. The apertured sheets may comprise filter media and/or support membranes for filter media in gas or liquid filters. The nanoparticles reduce the overall pressure drop across the support membranes to improve the efficiency of such filters.
Claims17
A polymeric sheet comprising:
- at least one polymer layer having one or more apertures for flow of gas or liquid therethrough, wherein the apertures are hexagonal, square or diamond shaped;
- and
- a plurality of nanoparticles disposed within the polymer layer, wherein the nanoparticles have at least one dimension less than 1 micron.
A gas filter comprising:
- a filter media;
- and
- a substantially rigid support layer bonded to the filter media, wherein the support layer includes fibers and a plurality of nanoparticles disposed within the support layer, wherein the nanoparticles have at least one dimension less than 1 micron, wherein the support layer comprises at least one extruded polymer film having one or more apertures for flow of gas or liquid therethrough.
A composite material, comprising:
- a substrate having pores within an internal structure, wherein the pores are hexagonal, square or diamond shaped;
- a plurality of nanoparticles within the internal structure of the substrate, the nanoparticles having at least one dimension less than 1 micrometer;
- and
- wherein the nanoparticles form a gradient within the substrate such that a density of the nanoparticles decreases from a first surface to an opposing second surface of the substrate.
Dependencies are inferred from the claim text.