Patent ID: 11896921
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B  D | IPC B  D

Claim 0:
1. A filter medium for filtering particulate matter from a liquid, the filter medium comprising:
a nonwoven sliver formed into a predetermined shape, wherein the nonwoven sliver comprises:
first synthetic staple fibers having a first denier;
second synthetic staple fibers having a second denier; and
third synthetic staple fibers having a third denier;

wherein the filter medium has a substantially cylindrical or spherical shape and comprises a core and an outer wrap, a density of the core being greater than a density of the outer wrap,
wherein the filter medium is configured to filter particulate matter from a liquid, with a fiber migration of about 100 fibers or less for a flush volume of about 19,000 milliliters at a flow rate of about 600 cubic centimeters per minute;, wherein:
the nonwoven sliver is a first nonwoven sliver comprising synthetic staple fibers having a first density,
the filter medium further comprises a second nonwoven sliver comprising synthetic staple fibers having a second density,
the core comprises the first nonwoven sliver, and
the outer wrap comprises the second nonwoven sliver.