Fiberfill structure
AssigneeE. I. Du Pont de Nemours and Company
InventorIlan Marcus
Life of this patent
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Abstract
A process of preparing new down-like clusters employs a method of point-bonding thermoplastic cut fibers in a stack of webs of carded fibers or continuous filaments in a tow, and then cutting and separating the resulting clusters which have an entirely different structure that is refluffable. Ultrasonic bonding has worked well as the bonding method, but other methods may prove useful.
Claims9
A filling material comprising clusters of bonded thermoplastic fibers, the fibers having crimped configuration and being bonded together at only one location in each cluster, the bonding location extending along a minor proportion of the length of the fibers, said improvement being characterized by the fibers being bonded at locations that vary in different clusters in the filling material.
Dependencies are inferred from the claim text.