Polyester fiberfill and process
AssigneeE. I. Du Pont de Nemours and Company
InventorMarcus Ilan
Life of this patent
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Abstract
Polyester fiberfill having spiral-crimp, especially in the form of an omega (.OMEGA.), that is randomly-arranged and entangled in the form of fiberballs with a minimum of hairs extending from their surface, and having a refluffable characteristic similar to that of down on account of the low cohesion between the balls. A process for making such fiberballs by repeatedly air-tumbling small tufts of such fiberfill against the wall of a vessel.
Claims19
Refluffable fiberballs of average dimension 1 to 15 mm, consisting essentially of randomly-arranged, entangled, .OMEGA.-crimped polyester fiberfill having a cut length of about 10 to about 60 mm, and having a cohesion measurement as defined of less than 6 Newtons (N).
Refluffable fiberballs of average dimension 1 to 15 mm, consisting essentially of randomly-arranged, entangled, spirally-crimped polyester fiberfill having a cut length of about 10 to about 60 mm, and having a cohesion measurement as defined of less than 6 Newtons (N), wherein the fiberfill is lubricated with a coating of a slickener consisting essentially of chains of poly(alkylene oxide).
Process for making polyester fiberfill having refluffable characteristics, wherein small tufts of polyester fiberfill having .OMEGA.-crimp are repeatedly tumbled by air against the wall of a vessel to provide an assembly of fiberballs having a cohesion value as defined of less than 6 N.
Dependencies are inferred from the claim text.