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Knowledge about food packaging bags

Main materials used in food packaging bag makingThe main materials used in the production of food packaging bags arePPandPEmaterial.Of course, according to the needs of the packaged product itself, the required materials are also different. The packaging material is selected according to the product being packaged.For example, ordinary food can chooseOPP/PEAfter the material is made into a composite bag for product packaging, similar products that require high temperature cooking can be selectedPA/PEorCPPMaterial, food that needs to be refrigerated can be selectedPA/PEorCPPand other materials. For special products, multi-layer composite bags or aluminum foil bags can be selected.Each of the above materials has the functions of anti-puncture, anti-oxidation, easy printing, high transparency, moisture-proof, oil-proof and so on.Combining the characteristics of the above materials, you can make the most suitable packaging bag for your own products.Note:PP:Polypropylene, polypropylene. PE:polyethylene, polyethylene. OPP:O-phenylphenol, o-phenylphenol. PA:Polyamidepolyamide fibers. CPP:cast polypropylene, Cast polypropylene film.Hygienic performance of food packaging bags:including evaporation residue(Acetic acid, ethanol, n-hexane),**Consumption, heavy metals, decolorization tests. Evaporation residues reflect the possibility of residues and heavy metals being precipitated when food packaging bags encounter vinegar, wine, oil and other liquids during use. Residues and heavy metals will have adverse effects on human health. In addition, residues will directly affect the color and aroma of food. , taste and other food quality.Degradation performance:According to the different types of product degradation, it can be divided into photodegradable type, biodegradable type and environmental degradation type. The degradation performance reflects the ability of the product to be accepted by the environment after being used and discarded. If the degradation performance is good, the bag will break, differentiate and degrade by itself under the combined action of light and microorganisms, and eventually become debris, which is accepted by the natural environment.;If the degradability is not good, it will not be accepted by the environment, thus forming”White pollution”.The inspection items of food packaging composite film bags are mainly divided into the following categories:The appearance should be smooth, without scratches, burns, bubbles, broken oil and wrinkles, and the heat seal should be smooth and free of false seals. The film shall not have cracks, pores and composite layer separation. No impurities, foreign objects and oil stains and other pollution.The soaking liquid in the bag shall not have peculiar smell, odor, turbidity and discoloration.

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