Composite packaging materials selection should fully understand the performance of a reasonable choice

recently, shandong province pledges inspect bureau according to the law of the People's Republic of China on food * act and the shandong province food supervision and inspection specification, Trial) 'Regulation on the supervision and inspection in the fourth quarter of 2012. In which multiple manufacturers of multilayer composite food sack because benzene solvent residual, inspection is unqualified.

composite packaging is two or more materials, through one or more dry compound process and combined together, which constitutes a functional composite packaging. Generally can be divided into basic, functional layer and heat sealing layer. Base is a beautiful, printing, the wet resistance etc. Such as BOPP, BOPET, BOPA, MT, KOP, KPET, etc; Function layer main block, avoid light, such as VMPET, AL, EVOH, PVDC, etc; Heat sealing layer of direct contact with packaging items, adaptability, resistance to permeability, good heat sealing and transparency, open sex, and other functions, such as LDPE, LLDPE, MLLDPE, CPP, VMCPP, EVA and EAA, E - MAA, EMA, EBA, etc.

with the continuous reform and development of packaging technology, a large number of used in food packaging industry with good quality, fresh and prolong the shelf life of plastic packaging materials. How to choose appropriate packaging materials, plays an important role in guarantee the quality of food *.

is widely used on the market at present most of food packaging is given priority to with compound packing materials. Used in food packaging materials need to have proper barrier property, at the same time to have good physical and mechanical properties, including tensile strength, tear strength, impact strength, etc. ; Have good chemical stability and should not be within and no chemical reaction occurred in the food, to ensure that food *. Must have the high temperature resistance, suitable for food of high temperature sterilization and storage at low temperature, etc.

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