Food packaging bag with fresh-keeping function and preparation method thereof

Abstract

The invention discloses a food packaging bag with a fresh-keeping function and a preparation method thereof, and relates to the technical field of packaging bag preparation. The food packaging bag is prepared from the following raw materials in parts by mass: 60-80 parts of polyvinylidene chloride, 2-4 parts of a coupling agent, 1-2 parts of epoxy linseed oil, 10-20 parts of filler, 5-10 parts of mugwort powder and 10-20 parts of a plant extraction bacteriostatic agent. The food packaging bag disclosed by the invention has high mechanical strength, and the food packaging bag has excellent insect-resistant, bactericidal and bacteriostatic effects by adding mugwort, the plant extraction bacteriostatic agent and the like. Active argil is added as a filler in the PVDC preparation process, the packaging bag likes a micro-filter sieve while the certain barrier property of the packaging bag is guaranteed, gas and moisture generated in the storage process of food, especially fruits and vegetables, can penetrate through the packaging bag to a certain degree, and carbon dioxide, oxygen and water inside and outside the bag can be exchanged, so that bad gases such as ammonia gas in the bag can be absorbed.

Description

technical field [0001] The invention belongs to the technical field of packaging bag preparation, and in particular relates to a food packaging bag with fresh-keeping function and a preparation method thereof. Background technique [0002] With the rapid development of my country's economy, the level of purchasing power and consumption willingness of domestic residents are gradually increasing, and consumption concepts will tend to further improve the quality of life. In particular, food packaging materials are in direct contact with the packaged food, which has been widely valued because it will affect the safety of food and thus affect the safety of human body. At present, the food packaging bags with fresh-keeping function mainly include polyethylene (PE), polyvinyl chloride (PVC) and polyvinylidene chloride (PVDC). Among them, when the PVC material is used improperly, it has certain potential harm to the human body. PVDC is known as a "green" packaging material in many...

AI Technical Summary

Problems solved by technology

However, polyvinylidene chloride polyvinylidene chloride (PVDC) homopolymer is a polymer with high crystallinity, its thermal stability is poor, the processing temperature is too close to the decomposition temperature, and it is difficult to process and shape

In addition, on the one hand, its high barrier property can help reduce the evaporation of water in packaged food and realize a low-oxygen and high-carbon dioxide environment, but there are also some problems, such as the gas exchange inside and outside the fresh-keeping food bag, and the absorption or removal of bad gas in the bag etc. The effect is poor, and the microclimate adjustment effect in the packaging bag is limited