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US 4,360,015 AGranted
Multilayer absorbent structure
AssigneeThe Hartford
InventorNathan Mayer
Life of this patent
Estimating the term…
Abstract
A multilayer absorbent bandage and process for making the same having two absorbent layers separated by a grid material and covered on one side by an exterior layer which contacts the wound surface and on the other side by a moisture resistant barrier. The bandage is designed to maintain its structural integrity while being capable of absorbing large amounts of fluid.
Claims16
A multilayer absorbent structure, which comprises:
- (a) an exterior layer which contacts the wound surface;
- (b) an absorbent cellulosic layer joined to the exterior layer;
- (c) a nonabsorbent grid material which is joined on one side to the absorbent cellulosic layer and on the other side to a flexible absorbent member;
- (d) said flexible absorbent member formed of a flexible sheet of sponge material containing a web of absorbent fibers disposed on the flexible sheet and extending into the flexible sheet without extending through the flexible sheet;
- (e) a moisture resistant barrier layer making an outer layer which is joined to the lower side of the sponge material portion of the flexible absorbent member.
2 more elements
A multilayer absorbent structure, which comprises:
- (a) an exterior layer which contacts the wound surface selected from a porous non-woven web material or a perforated thermoplastic material;
- (b) a non-woven, loosely spaced absorbent cellulosic layer joined to the exterior layer;
- (c) a nonabsorbent grid material having between 1 and 20 openings per inch and which is joined on one side to the absorbent cellulosic layers and on the other side to a flexible absorbent member;
- (d) said flexible absorbent member formed of a flexible sheet of polyurethane foam containing a web of rayon fibers disposed on the foam and extending into but not through the foam;
- and
- (e) a moisture resistant barrier layer making an outer layer which is joined to the lower side of the sponge material portion of the flexible absorbent member.
3 more elements
A process for preparing a multilayer absorbent structure which comprises:
- (a) bonding two absorbent layers to a grid material having between 1 and 20 openings per inch so that the grid material separates the two absorbent layers, said absorbent layers comprising an absorbent cellulosic layer and a flexible absorbent material formed of a flexible sheet of sponge material covered with a web of needle pressed absorbent fibers;
- (b) bonding an exterior layer which is capable of transmitting fluid to the absorbent cellulosic layer;
- and
- (c) bonding a moisture resistant barrier to the sponge material of the flexible absorbent material.
1 more element
Dependencies are inferred from the claim text.