Food bags include evaporation residues (acetic acid, ethanol, n-hexane), potassium permanganate consumption, heavy metals, bleaching tests. Evaporation residue is reflected in the use of food packaging bags case of vinegar, wine, oil and other liquid precipitation residue, the possibility of heavy metals, residues and heavy metals will have an adverse effect on human health, in addition residue will directly affect the color of food, incense , Taste and other food quality.
Degradation performance
Depending on the type of product degradation, can be divided into photodegradable, biodegradable, environmentally degradable. Degradation is the ability of the product to be accepted by the environment after it has been disposed of. If its degradability is good, the bag will break, differentiate and degrade under the action of light and microorganisms, eventually becoming debris and accepted by the natural environment. If the degradation is not good will not be accepted by the environment, resulting in "white pollution."
Food packaging film bag inspection project is divided into the following categories:
The appearance should be smooth, no scratches, burns, bubbles, broken oil and wrinkles, heat sealing formation, without false seal. The film shall be free of cracks, porosity and separation of the composite layer. No impurities, foreign body and grease and other pollution.
Bag soaking liquid, may not have smell, odor, turbidity and decolorization phenomenon.
