US 10,478,537 B2 · Cell separation filter material and filter obtained by layering same

Abstract

An object of the present invention is to provide a novel filter material and a filter including the same. Specifically, the present invention aims to provide a filter material capable of filtering in a short period of time, without clogging of the filter, while maintaining high cell separation properties, and a filter including the same. More specifically, the present invention aims to provide a filter material in which fiber masses (flocs) are uniformly distributed, and a filter including the same. The present invention provides a novel filter material showing excellent cell separation properties and excellent flow-through properties regardless of design choices for filters known prior to the filing of the present application, and an efficient cell separation method using a novel filter on which the filter material is stacked.

Claims12

Dependent claims

A filter comprising:

an inlet and an outlet for a liquid;
and
at least two nonwoven fabrics stacked in a liquid flow direction,
wherein
a nonwoven fabric, of the at least two nonwoven fabrics, on an inlet side of the filter, and a nonwoven fabric, of the at least two nonwoven fabrics, on an outlet side of the filter have an average fiber diameter of from 0.3 to 5.0 μm,
a thickness of from 0.10 to 0.60 mm,
a basis weight of from 10 to 100 g/m2, and
an average floc size index of from 1.0 to 4.0.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/030,130Filed 7 Oct 2014

Priority

JP 2013-21767218 Oct 2013

Published

US 2016/0263297 A115 Sep 2016

Granted

19 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification16 codes

A61M 1/3633
Degassing devices; Buffer reservoirs; Drip chambers; Blood filters: blood component filters, e.g. leukocyte filters
A61M 1/0218
Multiple bag systems for separating or storing blood components: with filters
A61M 1/3496
Filtering material out of the blood by passing it through a membrane, i.e. hemofiltration or diafiltration: plasmapheresis; Leucopheresis;…
A61M 1/3635
Blood component filters, e.g. leukocyte filters: constructional details

Cell separation filter material and filter obtained by layering same

Life of this patent

Cell separation filter material and filter obtained by layering same

Life of this patent

Abstract

Claims12