Directive Regenerated cellulose film

Commission Directive 93/10/EEC of 15 March 1993 relating to materials and articles made of regenerated cellulose film intended to come into contact with foodstuffs. OJ L 93, 17.4.1993, p. 27. 

Commission Directive 2004/14/EC of 29 January 2004 amending Commission Directive 93/10/EEC relating to materials and articles made of regenerated cellulose film intended to come into contact with foodstuffs. OJ L 27, 30.1.2004, p. 48. Commission Directive 93/11/EEC of 15 March 1993 concerning the release of the N-nitrosamines and N-nitrosatable substances from elastomer and rubber teats and soothers. OJ L93, 17.4.1993, p. 37. 

The adsorption isotherms for hydrocarbons on wet cellulose approach BET type III (1 0 in form as the relative humidity is increased (9.), and the isosteric heats approach the heat of condensation for all surface coverages of hydrocarbon (11 ). Thus, water lowers the affinity of cellulose for hydrocarbons. This effect is independent of any changes in surface area with relative humidity, and is also observed on regenerated cellulose film (12 ). However, the thermodynamic data indicate that the surface does not behave as expected for pure water, even at very high water contents (ll). In fact, the GC method has also been used to study adsorption of hydrocarbons on liquid water (15, l6). In this case, the interactions are very weak and the adsorption isotherm does not fit the BET theory, so that surface areas cannot be estimated directly (16). 

Specific Directives covering single groups of materials and articles listed in the framework Directive. To date, specific directives exist for three groups of materials and articles - ceramics, regenerated cellulose film, and plastics. 

Empirical C34H23N7O8S2 2Na Properties Dull grn. to bIk. powd. sol. 10-50 mg/ml in water soi. 1-10 mg/mi in DMSO, 95% ethanol sol. < 1 mg/ml in acetone m.w. 767.71 Precaution Probably combustible Storage Store refrigerated Uses Dye for leather, paper, aq. inks regenerated cellulose film Direct orange 6 CAS 6637-88-3... 

Cellulose films and fibres 210 000 Usage directly related to production of cellulose acid is consumed during the extrusion process, which results in the regeneration of the cellulose and the formation of Na2S04. Market now stable it declined sharply when polyolefin films penetrated the packaging market and polyester and other synthetic fibres cut into the cellulose fibre market... 

Giasson et al. (117) give direct electron microscopy evidence for the helicoidal structure of films of the cellulose acetates and of cellulose regenerated from the GTA films by aqueous ammoniiun hydroxide. 

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