Degradable plant starch-sodium caseinate composite packaging film for fruits and vegetables

Abstract

The invention discloses a degradable plant starch-sodium caseinate composite packaging film for fruits and vegetables and relates to the technical field of packaging films for the fruits and the vegetables. The packaging film is prepared from raw materials in parts by mass as follows: 80-90 parts of plant starch,40-50 parts of sodium caseinate, 15-20 parts of cloves, 15-20 parts of propolis, 15-18 parts of nano calcium carbonate, 12-15 parts of fumed silica, 10-12 parts of polyvinyl alcohol, 8-10 parts of sodium alginate, 8-10 parts of epoxidized soybean oil, 6-9 parts of zinc sulfide, 5-8 parts of konjac glucomannan, 5-8 parts of low-methoxyl pectin, 3-5 parts of sodium citrate, 3-6 parts of agar, 3-5 parts of genipin, 2-3 parts of polyglycerol fatty acid ester and 800-1000 parts of water. The plant starch and the sodium caseinate are used as main raw materials, and various aids are used as auxiliary materials, so that the produced packaging film has higher physical and mechanical properties, selective permeability and antibacterial and anti-oxidation effects; besides, the selected raw materials can be degraded easily, so that the ecological environment is protected.

Description

Technical field: [0001] The invention relates to the technical field of fruit and vegetable packaging films, in particular to a degradable vegetable starch-sodium caseinate composite fruit and vegetable packaging film. Background technique: [0002] Plastic film packaging is currently the most widely used packaging material for fresh fruit and vegetable production. It is transparent, so you can clearly see the condition of the packaged products; it has moisturizing properties, which can reduce the moisture loss of products and increase the freshness; It is airtight to protect the product from contamination. [0003] At present, the fruit and vegetable packaging films used in China are generally based on polymers such as polyethylene, polypropylene, and polyvinyl chloride, and are made by adding some plasticizers, inorganic fillers, and antibacterial agents. On the one hand, these packaging films have the disadvantage of being difficult to degrade or take a long time to deg...

AI Technical Summary

Problems solved by technology

On the one hand, these packaging films have the disadvantage of being difficult to degrade or take a long time to degrade, which is easy to cause white pollution and affect the environment; on the other hand, these packaging films have poor air permeability. If the oxygen concentration in the packaging film is too low or If the concentration of carbon dioxide is too high, the fruit will undergo anaerobic respiration, resulting in the accumulation of volatile substances such as ethanol and acetaldehyde, resulting in peculiar smell and smell, and reducing the flavor quality of the fruit