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US 5,514,122 AGranted
Feminine hygiene pad
AssigneeMinnesota Mining and Manufacturing Company
InventorsTerry L. Morris, Ying-Yuh Lu, Michele M. Parker, Joaquin Delgado
Life of this patent
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Abstract
A feminine hygiene pad is provided with a linerless microsphere pressure-sensitive adhesive attachment region for attaching the pad to an undergarment. The pads are stackable without release liners and can be used as a tape to form the liquid barrier backing of the pad.
Claims31
A disposable absorbent article having a linerless adhesive attachment region comprising a liquid permeable cover layer, an absorbent layer and a liquid impermeable backing layer and a linerless adhesive fastening region on at least one face of said backing layer, which adhesive comprises:
- (a) 1 to 60 parts of an elastic, tacky, solvent and water insoluble, solvent or water dispersible polymeric microspheres, comprising:
- (i) at least 70 parts of at least one free radically polymerizable monomers of any acrylate, methacrylate or vinyl ester;
- (ii) 0 to 30 parts of at least one polar monomer;
- and
- (iii) 0 to 30 parts of at least one hydrophilizing component;
- and
- (b) 99 to 40 parts of an aqueous latex, emulsion polymerized acrylate pressure-sensitive adhesive matrix providing 100 parts adhesive, the adhesive having a T-peel to cotton or nylon fabric of at least 25 gm/25 mm without significant adhesive transfer from the backing.
4 more elements
Dependencies are inferred from the claim text.