Abstract：As the consumers’ demand about food quality and preservation increased, and the enhancement of environmental awareness ,the edible packaging film made of natural biological material has gradually become a hot research. Edible film is composite film made of edible materials, itis mainly from lipids, proteins and polysaccharides, and other natural macromolecular material composition. As a new type of food packaging, it has a variety of good characteristics, and a wide variety, can be choose according to different properties of food, and have a high value and greater scope of application. This paper analysis the nature and function of the thickener Gellan Gum, cassava starch, , and than the experiment. By orthogonal experimental we will study the different characteristics of film under different dosage, and different conditions, through the specific edible film sensory evaluation, mechanical analysis, and other functional aspects of the performance on film, in order to have the best dosage of Gellan Gum, cassava starch and the glycerol plasticizers in the best film. The results showed that: It can be obtained better performance of the film when Gellan Gum0.35 %, cassava starch 8.86%, glycerol2.23 %, pasting temperature68℃ , dry temperature45℃ for 30 min .
Keywords：Gellan Gum; cassava starch; edible film; thickener
