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US 12,410,315 B2Granted
Biodegradable air filtering film and method for manufacturing same
Assignee4C Air, Inc.
InventorsMervin Zhao, Wang Xiao
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Abstract
A filtering film includes a porous substrate and a membrane disposed on the porous substrate. The membrane includes a plurality of fibers of one or more bio-degradable materials. The fibers have an average diameter of about 50 nm to about 3 μm. The one or more bio-degradable materials has a melt flow index of at least 5 g/10 min at 210° C. at a load of 2.16 kg.
Claims20
A filtering film, comprising:
- a porous substrate having an average pore size of 10-20 μm;
- and
- a membrane disposed on the porous substrate, the membrane comprising a plurality of nanofibers of one or more bio-degradable materials forming a fiber network, wherein the fiber network has an average pore size of 0.5-5 μm,
- wherein the average pore size of the porous substrate is greater than the average pore size of the fiber network;
- wherein the plurality of nanofibers have an average diameter of about 50 nm to about 3 μm,
- wherein the one or more bio-degradable materials have a melt flow index of between 5g/10 min and 6g/10 min at 210° C. at a load of 2.16 kg;
- and
- wherein the filtering film comprises an air pressure drop of between 100 Pascals and 120 Pascals under an air velocity of 14 centimeters per second.
5 more elements
An air filter comprising:
- one or more support films;
- and
- a filtering film attached to the one or more support films, wherein the filtering film comprises:
- a porous substrate having an average pore size of 10-20 μm;
- and
- a membrane disposed on the porous substrate, the membrane comprising a plurality of nanofibers of one or more bio-degradable materials forming a fiber network, wherein the fiber network has an average pore size of 0.5-5 μm,
- wherein the average pore size of the porous substrate is greater than the average pore size of the fiber network;
- wherein the plurality of nanofibers have an average diameter of about 50 nm to about 3 μm,
- wherein the one or more bio-degradable materials have a melt flow index of between 5g/10 min and 6g/10 min at 210° C. at a load of 2.16 kg, and
- wherein the filtering film comprises an air pressure drop of between 100 Pascals and 120 Pascals under an air velocity of 14 centimeters per second.
7 more elements
Dependencies are inferred from the claim text.