In order to facilitate the preservation and storage of food in life, product packaging bags were produced. Food packaging bags refer to film containers that are in direct contact with food and used to contain and protect food. Food packaging bags are in direct contact with food. How much do you know whether they pass the quality inspection?
Food packaging bags quality inspection
The appearance must not have defects such as bubbles, water lines, broken ribs, perforations, poor plasticization, fish-eye stiffness, etc. that are harmful to use. Specification width, length, and thickness deviations should be within the specified deviation range.
Physical and mechanical properties include tensile strength and elongation at break, which reflect the product’s ability to withstand stretching during use. If this item is unqualified, the food packaging bags (film) will be prone to rupture and damage during use.
Hygienic performance includes evaporation residue (acetic acid, ethanol, n-hexane), potassium permanganate consumption, heavy metals, and decolorization test. Evaporation residue reflects the possibility of precipitation of residues and heavy metals when food packaging bags encounter liquids such as vinegar, wine, and oil during use. Residues and heavy metals can have adverse effects on human health. In addition, residues can also directly affect the color and aroma of food. , taste and other eating quality.
Degradation performance can be divided into photodegradable, biodegradable and environmentally degradable types according to the degradation type of the product. Degradation performance reflects the ability of the product to be accepted by the environment after use and disposal. If the degradation performance is good, the bag (film) will break, differentiate and degrade on its own under the combined action of light and microorganisms, and eventually become debris, which is a good resource for the natural environment. If it is not degradable, it will not be accepted by the environment, thus forming “white pollution”.
