Food packaging bags of what material is the requirements

Food packaging is used to protect food and make food can save more a way of packing. In order to better protect the food, to ensure the health and safety. Food packaging has strict requirements on the material, and manufacturer of food packaging must have the corresponding qualification certificate. First food packaging bags lining must thin film can be direct contact with food. A lot of plastic raw materials to produce the film is suitable for industrial use, can not be used in food packaging. Currently the main material of thin film can be direct contact with food grade of PE, CPP, OPP, PA, PET, etc. The so-called food grade, namely the film no harmful substances, non-toxic material stable performance, don't react with food. Second many food packaging material of choice is composite material, composite material residues must be smaller than can affect the food safety and hygiene standards. The residual solvents must be 5 or less mg / ㎡, benzene solvent residues must be 1 mg per square meter or less. Solvent mainly contain ethanol, acetone, butanone, ethyl acetate, benzene, normal propyl acetate, toluene, ethyl benzene, xylene, residual amount shall not exceed 0. 01 mg / ㎡, isopropyl alcohol 0 or less. 02 mg / ㎡, n-butyl alcohol, n-butyl acetate, shall not exceed 0. 03mg/㎡。 Heavy metal residues 1 mg/L, or less potassium permanganate wastage 10 mg/L, or less evaporation residue of ethanol and n-hexane acuities were 30 mg/L. More than talking about the food packaging bags of material minimum safety and health standards, is will not affect the safety of food hygiene. But that does not play a real role, different food production, storage, transportation, environment each are not identical, the performance of the food also to, is different to the requirement of packaging. If, after the completion of some food packaging need high temperature sterilization, so food packaging material requires high temperature resistant; In some food production is completed, is to freezing, frozen storage, so food packaging material requires good low temperature resistance. Tags: food packaging bags
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