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US 10,137,394 B2Granted
Interlaced filtration barrier
AssigneeNano and Advanced Materials Institute Limited
InventorsHo Wang Tong, Sau Kuen Connie Kwok
Life of this patent
Estimating the term…
Abstract
A filtration barrier comprises at least one barrier layer which includes polymeric nanofibers interlaced with microfibers, and at least one substrate layer which includes polymeric microfibers. The filtration barrier can be made by electrospinning process.
Claims20
A filtration barrier, comprising:
- at least one barrier layer that includes an interlaced structure that includes a plurality of first polymer-based nanofibers and a plurality of second polymer-based microfibers that are interlaced with the first polymer-based nanofibers in a same layer;
- and
- at least one substrate layer that includes a plurality of third polymer-based microfibers and that is attached onto the barrier layer,
- wherein the first polymer-based nanofibers and the second polymer-based microfibers that are interlaced with the first polymer-based nanofibers in the barrier layer both include a combination of cellulose acetate (CA) and polyethylene oxide (PEO), the first polymer-based nanofibers are electrospun nanofibers, the second polymer-based microfibers are electrospun microfibers, the first polymer-based nanofibers account for 60%-70% by weight of the barrier layer, and the interlaced structure of the barrier layer has a pore size of 100-10000 nanometers;
- and further wherein the first polymer-based nanofibers and the second polymer-based microfibers are made from a same polymer solution that includes the combination of the CA and the PEO, wherein the first polymer-based nanofibers and the second polymer-based microfibers are discharged together from the same polymer solution during electrospinning to form the interlaced structure.
2 more elements
A filtration barrier, comprising:
- a barrier layer that includes nanofibers that are interlaced with first microfibers in the barrier layer;
- and
- a substrate layer that is attached to the barrier layer and that includes second microfibers,
- wherein polymers of both the nanofibers and the first microfibers include a combination of cellulose acetate (CA) and polyethylene oxide (PEO), polymers of the second microfibers are selected from a group consisting of polyester, nylon, polyethylene, polyurethane, cellulose, polybutylene terephthalate, polycarbonate, polymethylpentene and polystyrene, the nanofibers account for 60%-70% by weight of the barrier layer, the nanofibers are electrospun nanofibers, and the first microfibers are electrospun microfibers, and the nanofibers and the first microfibers are interlaced such that the nanofibers cross over and under the microfibers to form the barrier layer having a pore size of 100-10000 nanometers.
1 more element
A filtration barrier, comprising:
- a barrier layer that includes a plurality of nanofibers that are interlaced with a plurality of microfibers in the barrier layer;
- and
- a substrate layer that is attached to the barrier layer and that includes polypropylene,
- wherein the nanofibers and the microfibers are made of a combination of cellulose acetate (CA) and polyethylene oxide (PEO), the barrier layer includes the combination of the CA and the PEO at a weight of 0.8 gsm, the nanofibers account for 60%-70% by weight of the barrier layer, the nanofibers are electrospun nanofibers, the microfibers are electrospun microfibers, and the nanofibers and the microfibers are interlaced to form the barrier layer having a pore size of 100-10000 nanometers.
1 more element
Dependencies are inferred from the claim text.