Back to results
US 4,544,596 AGranted
Stabilized absorbent structure containing non-delignified wood pulp fibers
AssigneePersonal Products Company
InventorDennis C. Holtman
Life of this patent
Estimating the term…
Abstract
A batt of non-delignified fibers is stabilized by applying ultrasonic energy thereto in narrow compressed lines which aid in distributing liquid within the batt. The fibers are partially delignified at fiber intersections which are hydrogen bonded. Supplementary stabilization may be provided by thermoplastic bond sites.
Claims16
An absorbent batt comprising:
- a web including an assemblage of non-delignified wood pulp fibers, said web having compressed narrow lines wherein said fibers in said lines are at least partially delignified at fiber intersections by ultrasonic energy treatment within said lines and said fiber intersections are hyrogen bonded to one another to stabilize said batt, said lines providing a fluid distribution network within said batt and having a width up to about 1/4 inch and wherein the density in said lines is at least 0.2 gm/cc.
The method of forming an absorbent batt comprising:
- providing an assemblage of non-delignified woodpulp fibers;
- and applying ultrasonic energy to said assemblage of fibers in spaced, narrow lines to (1) at least partially delignify said fibers at fiber intersections within said spaced, narrow lines, and (2) hydrogen bond said fibers at said fiber intersections to stabilize said batt and provide a fluid distribution network within said batt.
Dependencies are inferred from the claim text.