The importance in the process of printing ink in the production of food packaging

used in food packaging printing ink is mainly type resin and solvent, these two types of printing ink containing heavy metals and organic volatile. China's food packaging printing ink is mainly used for solvent ink, therefore, the product of the harmful solvents with ethyl acetate, toluene, ethyl ketone, dimethyl benzene, isopropyl alcohol. Plastic flexible packaging market in China, occupy the vast majority of small and medium-sized enterprises, the production technical product is not high, or the same, so the competition is fierce, * after tend to reduce the cost of focus, and ignore the product specification and requirement! Toluene is the aromatic hydrocarbon solvent in a lot of use! Ink as printed material, when it is used in food packaging, you need to meet more functional requirements. Internationally recognized food printing ink must abide by the principle of free transfer; Food packaging printing on the inner surface shall not be used when conventional ink; Printing manufacturer shall ensure that all after printing ink solvents in volatile, ink required cure thoroughly, and achieve the corresponding application industry standards. In plastic packaging printing process, some enterprises in order to dilute the ink containing benzene and excessive add and various solvents of heavy metals, and pollution in the process of packaging food. Usually flexible packaging enterprises of butanone, xylene, is a less amount of isopropyl alcohol to join, the residue is 0, namely according to the standard method should not detect its content. Generally speaking the solvent residue in the printing ink is refers to the content of toluene and ethyl acetate, among them, the benzene solvents * big to the harm of people, in the use of benzene exceed a certain limit for people even has a fatal harm. In addition, both type resin ink and solvent ink, heavy metals such as mercury, lead, arsenic, chromium, cadmium, selenium, antimony, barium and there exists a great harm to human body, the heavy metal element when the excessive can cause heavy metal poisoning when ingested.