Film-coating materials

Table 18 Some Commonly Used Film-Coating Materials... 

Polycrystalline Films/Coatings Materials Specific Multilayer Stacks Extensive Interfaces Interfacial Stability... 

Cellulose acetate phthalate (CAP) is used as an enteric film coating material, or as a matrix binder for tablets and capsules.Such coatings resist prolonged contact with the strongly acidic gastric fluid, but dissolve in the mildly acidic or neutral intestinal environment. 

Polymethacrylate copolymers are widely used as film-coating materials in oral pharmaceutical formulations. They are also used in topical formulations and are generally regarded as nontoxic and nonirritant materials. 

Hogan JE. Film-coating materials and their properties. In Cole G, ed. Pharmaceutical Coating Technology. Bristol, PA Taylor Francis Inc., 1995. 

Insoluble polymers or polymers with a low rate of solution are used more to form thin films, as film-coating materials, surgical dressings or membranes for dialysis or filtration or to form matrices for enveloping dmgs to control their release properties or simply as packaging materials. 

Surface tension of film coating material in solution... 

Table 18.3 Some commonly used film-coating materials [8].

Sorption isotherms, sorption enthalpies, and viscoelastic damping produced by water absorption in pharmaceutical film coat materials (in preparation). 

Ethyl cellulose is mainly used as a thin-film coating material [111] and is also used as a food additive in the form of emulsifier. 

Applications include bottles and other containers, toys, kitchenware, water tanks, packaging film, coated materials for packaging, water and chemical pipe, wire insulation and sheathing, and film for agricultural and building applications. 

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