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US 12,533,639 B2Granted
Filter media
AssigneeDyson Technology Limited
InventorsGareth David Morte Morris, James George McManus, Benjamin James Hovell
Life of this patent
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Abstract
A filter media includes a membrane and a protective scrim secured to a surface of the membrane. The membrane includes fibres of a first polymer having a diameter less than 1 micron, and the scrim includes fibres of a second polymer. The first polymer is hydrophobic and has a contact angle greater than 90 degrees, and the second polymer is hydrophilic and has a contact angle less than 90 degrees.
Claims10
A filter media comprising:
- a hydrophobic membrane, and
- a hydrophilic protective scrim secured to an upstream facing surface of the hydrophobic membrane such that a portion of the surface of the hydrophobic membrane is exposed to dust through the hydrophilic protective scrim,
- wherein the hydrophobic membrane comprises fibres of a first polymer having a diameter less than 1 micron, the hydrophilic protective scrim comprises fibres of a second polymer, the first polymer has a contact angle greater than 90 degrees, and the second polymer has a contact angle less than 90 degrees,
- wherein each fibre of the hydrophilic protective scrim has an outer peripheral surface including first and second sections, wherein the first section contacts the upstream facing surface, wherein the second section extends continuously from a first end of the first section to a second end of the first section, and wherein the second section is exposed to an upstream environment.
1 more element
A filter media comprising:
- a hydrophobic membrane,
- a first hydrophilic protective scrim secured to an upstream facing surface of the hydrophobic membrane such that a portion of the surface of the hydrophobic membrane is exposed to dust through the first hydrophilic protective scrim, and
- a second hydrophilic protective scrim secured to a downstream facing surface of the hydrophobic membrane,
- wherein the hydrophobic membrane comprises fibres of a first polymer having a diameter less than 1 micron, the first and second hydrophilic scrims comprise fibres of a second polymer, the first polymer has a contact angle greater than 90 degrees, and the second polymer has a contact angle less than 90 degrees,
- wherein each fibre of the first hydrophilic protective scrim has an outer peripheral surface including first and second sections in cross-section, wherein an entirety of the first section contacts the upstream facing surface, wherein the second section of the outer peripheral surface extends continuously from a first end of the first section to a second end of the first section, and wherein the second section is fully exposed to an ambient environment.
2 more elements
Dependencies are inferred from the claim text.