Polyester fiberfill
AssigneeE. I. Du Pont de Nemours and Company
InventorIlan Marcus
Life of this patent
Estimating the term…
Abstract
Polyester fiberfill having spiral crimp that is randomly-arranged and entangled in the form of fiberballs with binder fibers, preferably with a minimum of hairs extending from the surface of the fiberballs, so as to be air-transportable on account of the low cohesion between the balls. A process for making such fiberballs by repeatedly air-tumbling small tufts of such fiberfill/binder/blend against the wall of a vessel. Improved bonded batts or molded articles or other bonded articles obtained by bonding such fiberballs.
Claims26
Fiberballs of average dimension about 2 to about 15 mm consisting essentially of randomly-arranged, entangled, spirally-crimped polyester fiberfill having a cut length of about 10 to about 100 mm, intimately blended with binder fibers in amount about 5 to about 50% by weight of the blend.
Fiberballs of average dimension about 2 to 15 mm, consisting of essentially of randomly-arranged, entangled, spirally-crimped bicomponent polyester/binder material fibers, having a cut length of about 10 to about 100 mm, wherein the bicomponent fibers are of sheath-core configuration, the sheath component being of lower melting binder material, whereas the core component is polyester component of melting point higher than that of the binder material.
Process for making polyester fiberballs from a blend of spirally-crimped polyester fiberfill with binder fibers, wherein small tufts of the blend are repeatedly tumbled by air against the wall of a vessel to provide the fiberballs.
Process for making polyester fiberballs from spirally-crimped bicomponent polyester/binder material fibers, wherein the bicomponent fibers are of sheath-core configuration, the sheath component being of lower melting binder material, whereas the core component is polyester component of melting point higher than that of the binder material and wherein small tufts of the spirally-crimped fibers are repeatedly tumbled by air against the wall of a vessel to provide the fiberballs.
Dependencies are inferred from the claim text.