Other characteristics of surgical articles that impact upon the comfort of the article during use include, without limitation, the drapeability, cloth-like feel and hand and cool, dry feel of the articles. The breathability of the surgical article, that is, its rate of water vapor transmission, is an important measure of how comfortable a surgical article is to use. Such surgical articles further should be comfortable during use, that is, while being worn. A measure of the barrier fabric's ability to prevent the passage of such airborne materials is sometimes expressed in terms of filtration efficiency. Such contaminates may also include particulate material such as, without limitation, lint, mineral fines, dust, skin squames and respiratory droplets. Examples of airborne contaminates include, without limitation, biological contaminates, such as bacteria, viruses and fungal spores. In surgical procedure environments, such liquid sources include the gown wearer's perspiration, body fluids from the patient, such as blood, and life support liquids, such as plasma and saline. Such surgical articles have, as a principal matter, been designed to greatly reduce, if not prevent, the transmission through the surgical article of biological liquids and/or airborne contaminates. Surgical gowns, surgical drapes, surgical face masks and sterile wrap and sterilization peel pouches (hereinafter collectively "surgical articles"), in order to function satisfactorily, must achieve a balance of properties, features and performance characteristics. More particularly, the present invention is directed to cloth-like, liquid-impervious, breathable film-nonwoven composite fabrics having biological liquid barrier capabilities for use as, for example, sterilization wrap, surgical draping, surgical gowns, cover garments, such as over-suits, and the like. The present invention is directed to cloth-like, liquid-impervious, breathable composite barrier fabrics.
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March 2023
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