Seton Company

Norwood Industries Inc.

Semex Medical, Inc.

Borys Rybalka

Martin I Edenbaum

W Raymond Bowditch

James Komerska

George Petito

The present invention is a nail hydration device in which a substrate sheet or film, suitable for application to the fingernail or toenail surface, includes a moisturizing constituent for hydrating the nail material. Preferably, the film is a polymeric film, more preferably a moisture vapor permeable polymeric film, adjacent to which is incorporated an aqueous phospholipid composition, an adhesive layer, and optional hydrolyzed animal protein (gelatin, collagen, etc.). The most preferred aqueous phospholipid composition contains water and soya phospholipids such as, for example, an aqueous soya lecithin emulsion. Typically, the aqueous phospholipid composition is dispersed within the adhesive layer. The films or tapes, which may be backed with a release liner and/or precut in the appropriate shapes, are applied to the exposed fingernails or toenails to hydrate and otherwise treat the nail material to prevent nail brittleness. The films or tapes may be applied periodically on a nightly (i.e., or every-other-night basis) in a program for minimizing nail fracture or other damage.

Nail treatment device

A disposable bandage, and a process for manufacturing it, which is prepared from a single sheet or strip of liquid permeable, flexible thermoplastic hydrophilic foam. The process includes coating the entire surface of one side of a foam sheet or strip with a layer of porous pressure sensitive adhesive, covering the same side of the laminate with a suitable release liner and heat compressing the laminate except in the area of the laminate intended for wound contact. The foam bandage so produced includes both a resilient absorbent pad and thin but absorbent adhesive-coated tabs and is suitable for use as an occlusive dressing. Optionally, the bandage may have a moisture vapor permeable, moisture impermeable skin thereon, to provide a water- andbacteria-proof protective outer layer for the foam bandage.

Foam bandage

A method of mechanically frothing and casting an aqueous polyurethane dispersion yields a foam which, when rolled, wound or stacked, is self-releasing from the pressure sensitive adhesive layer co-cured therewith. The method includes admixing an aqueous ionic polyurethane dispersion with a stearate stabilizer and an optional aziridine crosslinking agent, frothing and casing the admixture, and co-curing the resultant foam sheet with a pressure sensitive adhesive layer. Before frothing, the polyurethane dispersion contains particles having an average size of less than one micron, and contains between 35 and 70 percent by weight of the polyurethane dispersion, between 13 and 50 percent by weight of a 33 percent by weight dispersion of a stearate salt, and up to 33 percent by weight of polyfunctional aziridine. The foam produced from the frothed admixture provides a substrate with which an uncured pressure sensitive adhesive can firmly co-cure but to which the cured adhesive demonstrates readily removable adhesion. The laminate of the foam with a pressure sensitive adhesive thus provides either a medical dressing, or a general purpose tape for industrial use, which may be stacked or self-wound without release paper.

Self-release foam laminate

A disposable bandage, and a process for manufacturing it, which is prepared from a single sheet or strip of liquid permeable, flexible thermoplastic hydrophilic foam. The process includes coating the entire surface of one side of a foam sheet or strip with a layer of porous pressure sensitive adhesive, positioning wound release material in the area of the sheet or strip intended for wound contact, covering the same side of the laminate with a suitable release liner and heat compressing the laminate except at the locus of the wound release material. The foam bandage so produced includes both a resilient absorbent pad and thin but absorbent adhesive-coated tabs. Optionally, the bandage may have a moisture vapor permeable, moisture impermeable skin thereon, to provide a water- and bacteria-proof protective outer layer for the foam bandage.

MDI-based prepolymers are blown with a substantially nonaqueous blowing agent, such as pressurized air, and polymerized with stoichiometric amounts of polyoxyethylene polyol having at least two hydroxyl equivalents per mole, yielding a hydrophilic foam. The present foams may be extruded, knife-coated or otherwise cast into sheets, or may be fabricated by other known foam preparation techniques. Because the foam is polymerized with polyoxyethylene polyol instead of water, the foam exhibits both superior drape and improved stretch and recovery as compared with prior-art MDI-based flexible foams formed with aqueous reactants. The foam is particularly suited for use in external biomedical applications as, for example, a laminated medical/surgical dressing in which a thin sheet of the hydrophilic foam adheres to a nonstick aluminized veil on one side.

Hydrophilic foam

MDI-based prepolymers are blown with a substantially nonaqueous blowing agent, such as pressurized air, an polymerized with stoichiometric amounts of polyoxyethylene polyol having at least two hydroxyl equivalents per mole, yielding a hydrophilic foam. The present foams may be extruded, knife-coated or otherwise cast into sheets, or may be fabricated by other known foam preparation techniques. Because the foam is polymerized with polyoxyethylene polyol instead of water, the foam exhibits both superior drape and improved stretch and recovery as compared with prior-art MDI-based flexible foams formed with aqueous reactants. The foam is particularly suited for use in external biomedical applications as, for example, a laminated medical/surgical dressing in which a thin sheet of the hydrophilic foam adheres to a nonstick aluminized veil on one side.

Growing community of inventors

Philadelphia, PA, United States of America

Borys Rybalka