Production Cellophane

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cellulose treated alkali , carbon disulfide yield viscose.


cellulose wood, cotton, hemp, or other sources dissolved in alkali , carbon disulfide make solution called viscose, extruded through slit bath of dilute sulfuric acid , sodium sulfate reconvert viscose cellulose. film passed through several more baths, 1 remove sulfur, 1 bleach film, , 1 add softening materials such glycerin prevent film becoming brittle.


a similar process, using hole (a spinneret) instead of slit, used make fibre called rayon. chemically, cellophane, rayon , cellulose polymers of glucose; differ structurally rather chemically.







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