Antibacterial composite polylactic acid preservative film material and preparation method thereof

Abstract

The invention belongs to the technical field of high polymer material packaging, and particularly relates to an antibacterial composite polylactic acid preservative film material and a preparation method thereof. Through the design of a three-layer film structure, the purposes of preventing pathogens from polluting food and packaging materials, preventing harmful substances from breeding inside, maintaining the original flavor of the food, resisting bacteria and prolonging the shelf life are achieved. Through component modification of a polylactic acid film and application and bonding processdesign of the three-layer film structure, blocking, obstructing, prevention and control of pollutants and pathogens are performed from a food packaging source, the fresh-keeping treatment cost, the transportation cost and risk prevention and control of food are reduced, the comprehensive value of the food is improved, and the economic benefits, the social benefits and the environmental protectionbenefits are improved. The product is green, safe and degradable, can completely replace an existing polyethylene preservative film, and has wide popularization and application prospects.

Description

technical field [0001] The invention belongs to the technical field of polymer material packaging, and in particular relates to an antibacterial composite polylactic acid fresh-keeping film material and a preparation method thereof. Background technique [0002] With the deepening of my country's green environmental protection concept, antibacterial and fresh-keeping packaging technology has also developed rapidly. The mainstream cling film products currently on the domestic market are generally made of non-degradable polymers, such as polyethylene and other products, which are not environmentally friendly and have single functions, which cannot meet the requirements of market diversification and environmental protection and green concepts. Some degradable cling film products also need to be improved in terms of freshness preservation and antibacterial, and are generally single-layer or double-layer films, which are not capable of externally preventing pathogen pollution and...

AI Technical Summary

Problems solved by technology

The mainstream fresh-keeping film products currently on the domestic market are generally made of non-degradable polymers, such as polyethylene and other products, which are not environmentally friendly and have single functions, which cannot meet the requirements of market diversification and environmental protection and green concepts.

Some degradable plastic wrap products need to be improved in terms of freshness preservation and antibacterial, and are generally single-layer or double-layer films, which are not capable of preventing external pathogen pollution and internally preventing the growth of harmful substances.