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US 4,536,432 AGranted
Stabilized absorbent structure and method of making same
AssigneePersonal Products Company
InventorDennis C. Holtman
Life of this patent
Estimating the term…
Abstract
An absorbent batt of non-delignified fibers is stabilized by applying a lignin solvent to an assemblage of such fibers to soften at least 10 percent of the fibers. When the fiber assemblage is compressed and the solvent is removed, the softened lignin of adjacent contacting fibers cause a lignin-to-lignin interfiber bond to occur at the fiber intersection.
Claims10
The method of forming an absorbent batt comprising the steps of:
- providing an assemblage of non-delignified wood pulp fibers, applying a solvent to said assemblage of non-delignified wood pulp fibers to soften at least 10 percent of the lignin of said fibers;
- compressing said assemblage of non-delignified wood pulp fibers to cause softened portions of the lignin to form lignin-to-lignin interfiber bonds at fiber intersections;
- and removing the solvent from said assemblage of non-delignified wood pulp fibers.
The method of forming an absorbent batt comprising the steps of:
- providing an assemblage of non-delignified wood pulp fibers;
- applying a volatile solvent to said assemblage of non-delignified wood pulp fibers to soften at least 10 percent of the lignin of said fibers;
- compressing said assemblage of non-delignified wood pulp fibers to cause softened portions of the lignin to form lignin-to-lignin interfiber bonds at fiber intersections;
- and removing the solvent from said assemblage of non-delignified wood pulp fibers by heating the assemblage of fibers.
1 more element
An absorbent batt as set forth in claim 11 wherein said batt includes spaced embossed lines.
Dependencies are inferred from the claim text.