Hot water soluble disposable films, fabrics and articles

摘要

Cold water insoluble, hot water soluble and/or dispersible, disposable films, fabrics and other useful articles of manufacture are formed from a miscible polymeric resin blend comprised of cold water soluble partially hydrolyzed polyvinyl alcohol, cold water insoluble hot water disintegrable aliphatic polyester, and minor proportions of processing and performance aids. The aliphatic polyester has a melt temperature above the normal body temperature of a human (37 degrees C.; 98.6 degrees F.) and is present in the resin blend at a concentration sufficient to constitute the continuous phase of the blend, with the polyvinyl alcohol constituting a discontinuous phase of the blend. The aliphatic polyester thus renders the resin blend, and the partially hydrolyzed polyvinyl alcohol in the blend, cold water insoluble and determines the temperature at which articles formed from the blend will be subject to dissolution in an aqueous bath and subsequent disposal in an environmentally and ecologically sound fashion.