Food packaging plays an important role in food production and circulation. While bringing benefits and convenience to people, there are also environmental pollution problems caused by packaging waste. Edible packaging film is environmentally friendly, safe and biodegradable. Therefore, research on the preparation and application of edible packaging film has been carried out at home and abroad in recent years.
Sodium Carboxymethyl Cellulose (Sodium CMC or CMC) is a kind of cellulose ether in the form of a hot gel, which can form an excellent film. It is also a good food additive due to its thickening, stabilizing and emulsifying effect, so it is an ideal material for edible inner packaging film and has been widely used in pharmaceutical and food industry. CMC membrane is an efficient barrier to oxygen, carbon dioxide and lipids, but its resistance to water vapor transport is poor. The properties of edible membranes can be improved by adding hydrophobic materials such as lipids to the membrane forming solution. The film can prolong the shelf life and ensure the quality of food by preventing oxygen, moisture and solute migration. The base material of the film is mainly macro-molecular materials, with a certain mechanical strength and small permeability of oil, oxygen and water, which can prevent the leakage of seasoning juice or oil, the dampness and mildew of seasoning, and external bacterial infection. In addition, it has a certain property of water solubility, so it is convenient to process and eat. With the rapid development of instant food processing industry, the application of edible inner packaging film will gradually increase, and CMC plays quite an important role here.
We will talk about the specific application of CMC in edible inner packaging film in the next article. If you would like to get more information, please follow up and feel free to contact us.