Abdominal pad or surgical dressing

Claim 2

An abdominal pad or surgical dressing comprising: a central core layer of highly absorbent material having a thickness in the range of about one-fourth in. to three-eighths in.; an application covering over one side of said core material and comprising a first layer of thermoplastic material adjacent said core material and an outer covering of grid material bonded together under heat and pressure to form a non-sticking, non-sliding outer surface and permitting the passage of fluid while minimizing bleed back; and a moisture resistant barrier layer on the other side of said core material, said core layer, application covering and barrier layer being attached to form a unitary pad which will not separate.

Claim 3

The article of claim 1 wherein said moisture resistant barrier layer includes a second layer of thermoplastic film adjacent said core material and a layer of spun-bonded nylon on the outside of said second film material, the width of said core material being less than that of the other layers, all of said layers being formed together under the application of heat and pressure to bind at least two opposite peripheral edges together, said first thermoplastic film at least partially separating from itself as held by said first grid material to permit the transmission of fluids through said first grid material to be absorbed by said core material and to cover said grid material in partial wrapping engagement to provide said non-sticking, non-sliding exterior application surface.

Claim 4

The article of claim 1 wherein said first thermoplastic film layers comprise a thin polyethylene film having a thickness in the range 0.2 mils - 0.8 mils.

Claim 5

The article of claim 1 wherein said moisture resistant barrier is a perforated polyethylene film having a thickness of at least about 1 mil and is bonded to said application covering at least at opposite margins of said pad.

Claim 6

The article of claim 1 wherein said central core material comprises needle-punched bleached rayon.

Claim 7

The article of claim 1 wherein said grid material comprises spun-bonded nylon.

Claim 8

An abdominal pad or a surgical dressing comprising: a central core mAterial having a thickness of at least one-fourth inch; an exterior application covering on one side of said core material and comprising a first layer of thin thermoplastic sheet material and a first layer of tear-resistant grid material, arranged in the stated order proceeding outwardly from said core material, the layers comprising said application covering having a width greater slightly than the width of said core material to provide marginal edges extending beyond said core material; and a moisture resistant covering on the side of said core material opposite said application covering and comprising a perforated film of thermoplastic material bonded to said marginal edges of said application covering by said first and third thermoplastic film materials, said application covering being secured to said core material.

Claim 9

An abdominal pad or a surgical dressing comprising: a central core mAterial having a thickness of at least one-fourth inch; an exterior application covering on one side of said core material and comprising a first layer of thin thermoplastic sheet material and a first layer of tear-resistant grid material, arranged in the stated order proceeding outwardly from said core material, the layers comprising said application covering having a width greater slightly than the width of said core material to provide marginal edges extending beyond said core material; and a moisture resistant covering on the side of said core material opposite said application covering and comprising a perforated film of thermoplastic material bonded to said marginal edges of said application covering by said first and third thermoplastic film materials, said application covering being secured to said core material.

Claim 10

An abdominal pad or covering comprising a layer of highly absorbent core material having a thickness in the range onefourth in. to three-eighths in.; an application covering comprising a thin layer of thermoplastic material having a thickness of about 0.2 inch and a layer of spun-bonded nylon exterior of said layer of thermoplastic sheet material, said application covering a width greater than the corresponding width of said core material; and a moisture-resistant barrier on the side of said central core material opposite said application covering and comprising a second layer of air-pervious, liquid impervious material adjacent the core material; said moistureresistant covering also having a width greater than the corresponding width of said core material and being secured to said application covering under the application of heat and pressure about opposite peripheral edges about said core material, said spun-bonded nylon being bonded to said core material substantially throughout their opposing surfaces by said layer of thermoplastic material, and said moisture barrier being attached to said application covering.

Claim 11

An abdominal pad or covering comprising a layer of highly absorbent core material having a thickness in the range onefourth in. to three-eighths in.; an application covering comprising a thin layer of thermoplastic material having a thickness of about 0.2 inch and a layer of spun-bonded nylon exterior of said layer of thermoplastic sheet material, said application covering a width greater than the corresponding width of said core material; and a moisture-resistant barrier on the side of said central core material opposite said application covering and comprising a second layer of air-pervious, liquid impervious material adjacent the core material; said moistureresistant covering also having a width greater than the corresponding width of said core material and being secured to said application covering under the application of heat and pressure about opposite peripheral edges about said core material, said spun-bonded nylon being bonded to said core material substantially throughout their opposing surfaces by said layer of thermoplastic material, and said moisture barrier being attached to said application covering.

Claim 12

The article of claim 7 wherein said core material comprises superposed layers of absorbent material separated by a central layer of wicking material to transmit fluid passing to the first layer of core material throughout the body of said core material.