Patent ID: 6929853

Claim:
A multilayer breathable film having the combination of properties of: (i) providing a barrier to microorganisms; and (ii) providing a barrier to blood and bodily fluids; said breathable film comprising at least a three-layer film having us a minimum the following structure: C:D:C; where C comprises an outer monolithic layer containing a hydrophilic polymeric resin capable of absorbing end desorbing moisture and providing a barrier to water and microorganisms, said C layer being free of particulate filler; and, D comprises a microporous adhesive core layer for bonding said C layers together, wherein said C layer substantially prevents the buildup of particulate filler material on a die during formation of said muitilayer breathable film, and wherein said microporous adhesive core layer comprises particulate filler having an average particle size between about 0.8 microns and about 3 microns, where the microporous adhesive core layer has microvoids in a range from about 27.6% to about 42%, said microporous adhesive core layer being constructed and arranged to provide the passage of gaseous water but substantially prevent the passage of liquid water.