The main purpose of composite packaging bags is to package food, medicine, etc. Therefore, the hygiene of composite packaging bags is an important indicator. With the improvement of national health regulations and the improvement of consumer awareness, its requirements will be further improved. What are the factors that affect the hygiene of composite packaging bags?(1) effect of composite substratesOnly under the premise of ensuring the hygiene of the composite substrate can it be processed into a hygienic and safe composite bag. Composite substrates include various plastic films, aluminum foils, and aluminized films. On food and drug packaging bags, these substrates should be non-toxic, odorless, tasteless, and meet the hygiene and safety indicators. Among various composite substrates, the most influential is the inner layer substrate of the composite bag, which is in direct contact with the contents of the packaging bag.,EVA/EAA/EEAIn addition, the vast majority ofPEandPP. About polyethylene, polypropylene, these polymer materials that directly contact food and medicine.(2) effect of auxiliary materialsIn the normal process of composite packaging bags, a large number of auxiliary materials are needed, and the main auxiliary materials are ink, adhesive, solvent, smooth powder, etc. Due to the particularity of auxiliary materials, it has the greatest impact on the hygiene of composite packaging bags, because these organic low-molecular-weight substances can migrate into food and medicine through the composite inner layer.(3) Environmental health effectsThe production of composite packaging bags has to go through many links and processes. For this reason, the production and processing transfer and environmental sanitation in storage are also extremely important. The manufacturing equipment should be kept clean, the manufacturing equipment should not be toxic, the chemical warehouse should be kept under positive pressure, and the warehouse should clean.
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