Patent ID: 7998313
Filing Date: 2011-08-16
Classification: D21H

Abstract:
1. A method of making an inflated article of regenerated cellulose comprising: (a) preparing a cellulosic dope comprising cellulose dissolved in a suitable ionic liquid or quasi-ionic liquid; (b) dispersing an effervescing agent in the cellulosic dope, the effervescing agent and ionic liquid or quasi-ionic liquid being selected such that they are substantially inert with respect to each other; (c) regenerating the cellulosic dope into a shaped article comprising a regenerated cellulose matrix having dispersed therein substantially unreacted effervescing agent encapsulated by the regenerated cellulose matrix; and (d) thereafter, activating the encapsulated effervescing agent to generate a gas in-situ within the regenerated cellulose matrix and create a shaped article with an inflated structure.