It is understood that after more than 30 years of development, my country’s plastic food packaging industry has become an indispensable industry in the national economy. Although public opinion at home and abroad this year generally believes that plastic food packaging bags have various adverse effects on consumers’ health and the environment, and continues to call for the large and widespread use of paper food packaging bags, the consumption of plastic food packaging materials is still increasing rapidly.
The original intention of developing plastic food packaging materials is to solve the problems of various types of food being easily affected by moisture, mold, and deterioration due to lack of packaging or poor packaging. However, due to some reasons, consumers often smell food when opening food packaging bags. The strange smell or even bad smell in the packaging bags has led to many conflicts and disputes between consumers and food factories, food factories and food packaging bag manufacturers, and packaging factories and raw material suppliers.
Food packaging bags
In the gravure printing and solvent-based dry lamination processes of plastic composite materials, a large amount of organic solvents, such as toluene, ethyl acetate, butanone, etc., are required.
According to the process requirements, these solvents should be evaporated during the production process, but in the actual production process, due to various reasons, there will always be more or less solvents that are not completely evaporated, which is the so-called “residual solvent”. “Residual solvent” is generally a mixture of several solvents. When the content of “residual solvent” is lower than a certain value, the human sense of smell will not feel its presence, and it will not affect the taste of packaged food.
When the content of “residual solvent” is greater than a certain value, the human sense of smell can sense its presence. When consumers open food packaging bags with such high “residual solvent”, they may smell something different from moldy food. , the “smell” of decay.
The problem of odor in food packaging bags has been solved from the equipment and technology. The solvent-free laminating machine is used in the food packaging bags production workshop to solve the problem of solvent residue. The packaging bags are odorless and pollution-free, and the food inside allows you to rest assured and consumers Peace of mind. Won a good reputation for customers in the food industry.
