Invention Grant
- Patent Title: Wet-formed composite defining latent voids and macro-cavities
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Application No.: US09643803Application Date: 2000-08-22
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Publication No.: US06572735B1Publication Date: 2003-06-03
- Inventor: Palani Raj Ramaswami Wallajapet , Ronald Lee Edens , Cheryl Ann Mocadlo , Sheng-Hsin Hu , Dmitry Yavich , David Michael Kale
- Applicant: Palani Raj Ramaswami Wallajapet , Ronald Lee Edens , Cheryl Ann Mocadlo , Sheng-Hsin Hu , Dmitry Yavich , David Michael Kale
- Main IPC: D21F1100
- IPC: D21F1100

Abstract:
A wet-formed composite defining latent voids and macro-cavities, the wet-formed composite having a basis weight greater than about 100 grams per square meter and a density of about 0.06 grams per cubic centimeter or more. The wet-formed composite comprises fibers and superabsorbent material, with the superabsorbent material present in an amount of about 10 dry weight percent or less, specifically about 5 dry weight percent or less, and particularly about 2 dry weight percent or less, but more than 0, based on the total dry weight of fibers and superabsorbent material present in the wet-formed composite. By virtue of the superabsorbent material having been allowed to swell and then shrink during the making of the wet-formed composite, macro-cavities are created. Densification compresses the macro-cavities. The resulting composite expands upon wetting and exhibits good absorbency properties.
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