Studies on the film-formed properties and applications of edible chitosan film
Chitin is founded in the waste substances from the shellfish , Chitosan is partially N-acetylated 2-deoxy-2-amino-α-glucan derived from chitin, chitosan is nontoxic, edible, antimicrobial and can be used to make a range of films with good properties. Chitosan is the second most abundant polyaccharide on the earth. and commercially available from a stable potential packaging material resource. Chitosan coatings (films) defined as thin layers applied to the surface of fruits and vegetables have been used to reduce weight loss, inhibit respiration rate ,decrease the rate of metabolic progress and extend the shelf life of food. Chitosan films are transparent and its tensile strength is close to witch of the HDPE and LDPE. The use of edible films and coatings is an advantage method of improving quality, stability, cleanliness of numerous foods and also beneficial to the environment.