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US 12,594,528 B2Granted
Spacer film with integrated lamination strip
AssigneeEntegris, Inc.
InventorJohn P. Puglia
Life of this patent
Estimating the term…
Abstract
Spacers for filtration membranes that are formed from perforated films. The spacer include unperforated regions, which can serve as integrated lamination strips, advantageously omitting the need for separate lamination steps required with woven and nonwoven spacer fabrics while also providing a spacer with a uniform thickness.
Claims12
A filter element, comprising:
- At least one spacer wherein the spacer is a film having an unlaminated thickness from about 20 μm to about 180 μm and having perforations substantially located in a central region and at least two unperforated regions located on opposing edges of the film, the unperforated regions being laminable to a filtration membrane, and
- A filtration membrane adjacent to the at least one spacer;
- Wherein the filtration membrane and the at least one spacer are arranged about a core, and the at least one spacer does not comprise a lamination strip.
A filter comprising:
- A housing,
- A filtration membrane, and
- At least one spacer adjacent to the filtration membrane wherein the spacer is a film having an unlaminated thickness from about 20 μm to about 180 μm and having perforations substantially located in a central region and at least two unperforated regions located on opposing edges of the film, the unperforated regions being laminable to a filtration membrane;
- Wherein the filtration membrane and the at least one spacer are arranged about a core within the housing, and the at least one spacer does not comprise a separate lamination strip.
1 more element
Dependencies are inferred from the claim text.