Freeze dried microfibrilar cellulose
AssigneePersonal Products Company
InventorsPronoy K. Chatterjee, Kambiz B. Makoui
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Abstract
Absorbent retentive pulp, produced by mechanically treating a dispersion of cellulose fiber to the disintegrated and outer secondary walls to microfibrillar form. The beaten dispersion is then freeze dried.
Claims18
An absorbent product comprising as an absorbent element therein fibrous cellulose pulp having been beaten and freeze dried, said beaten, freeze dried cellulose pulp comprising sheet like particles of microfibrils, said sheet like particles arranged as discontinuous walls surrounding void volumes.
An absorbent product comprising as an absorbent element therein highly absorbent, retentive cellulose pulp, said cellulose pulp having been provided by:
- forming a dilute aqueous dispersion of cellulose fibers;
- extensively beating said slurry to a degree such that at least the outermost of the secondary walls of said cellulose fibers are essentially completely disintegrated into microfibrillar form;
- and
- freeze drying said slurry;
- whereby said highly absorbent, retentive cellulose pulp results.
Dependencies are inferred from the claim text.