| 摘要 |
Self supporting cellulosic film produced by dissolving cellulose having a viscosity number as determined by the viscometric test SCAN-CM 15:88 of greater than or equal to about 400 in a solvent therefor to form a solution containing less than or equal to about 15% by weight of cellulose, and extruding the solution into a precipitation bath whereby the film is produced.. These films are useful in producing products with increased strength combined with increased porosity such as bags for rehydration by osmosis.
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