Spunbond polycarbonate resin filter media
AssigneeSabic Global Technologies B.V.
InventorsRichard Peters, François Guillaume Sébastien Courtecuisse, Juha-Matti Levasalmi, Richard Lucas
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Abstract
The invention concerns spunbond nonwoven fabrics comprising a plurality of bicomponent filaments, the bicomponent filaments having a segmented pie cross-sectional configuration including a polycarbonate component and a polypropylene component, wherein a ratio of the polypropylene component to the polycarbonate component is between about 5:95 and about 95:5.
Claims19
A spunbond nonwoven fabric comprising a plurality of bicomponent filaments, the bicomponent filaments having a segmented pie cross-sectional configuration including a first dielectric component and a second dielectric component, wherein the first dielectric component and the second dielectric component are immiscible, wherein a ratio of the second dielectric component to the first dielectric component is between about 5:95 and about 95:5, and wherein the first dielectric component comprises a polycarbonate component and the second dielectric component comprises a polypropylene component.
A method of making a spunbond nonwoven fabric comprising:
- separately melting a polycarbonate component and a polypropylene component;
- directing the polycarbonate component and the polypropylene component through spinneret orifices configured to form a plurality of bicomponent filaments;
- and
- causing at least a portion of the bicomponent filaments to break apart and entangle with each other;
- wherein the bicomponent filaments having a segmented pie cross-sectional configuration including the polycarbonate component and the polypropylene component, wherein the polycarbonate component and the polypropylene component are immiscible, and wherein a ratio of the polypropylene component to the polycarbonate component is between about 5:95 and about 95:5.
An article comprising:
- a housing;
- at least one filter media disposed adjacent the housing, the filter media comprising a spunbond nonwoven fabric comprising a plurality of bicomponent filaments, the bicomponent filaments having a segmented pie cross-sectional configuration including a polycarbonate component and a polypropylene component, wherein the polypropylene component and the polycarbonate component are immiscible, wherein a ratio of the polypropylene component to the polycarbonate component is between about 5:95 and about 95:5.
Dependencies are inferred from the claim text.