Multilayer absorbent structure
First Claim
Patent Images
1. 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.
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Accused Products
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.
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Citations
16 Claims
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1. A multilayer absorbent structure, which comprises:
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(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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A multilayer absorbent structure, which comprises:
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(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.
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12. A process for preparing a multilayer absorbent structure which comprises:
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(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. - View Dependent Claims (13, 14, 15, 16)
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Specification