What kind of food packaging bags are qualified?
Nowadays, in the food industry, food packaging bags are an indispensable part.
The quality of food packaging bags directly affects the quality of products, so what kind of food packaging bags are qualified? Let's explain it briefly.
1. The appearance shall not have bubbles, water marks, perforations and other defects. The deviation of specification width, length and thickness shall be within the specified deviation range.
2. 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 not up to standard, food packaging bags (Membrane)It is prone to rupture and damage. 3. Hygienic performance includes evaporation residue (Acetic acid, ethanol, n-hexane)
, Potassium permanganate consumption, heavy metals, decolorization test.
Evaporation residue reflects the possibility of separating out residue and heavy metals when food packaging bags meet vinegar, wine, oil and other liquids during use. Residue and heavy metals will have adverse effects on human health, in addition, the residue will directly affect the food quality such as color, aroma and taste.
4. Degradation performance can be divided into photodegradation type, biodegradation type and environmental degradation type according to different degradation types of products.
Degradation performance is to reflect the ability of the product to be accepted by the environment after use. If the degradation performance is good, the bag (Membrane)
It will break, differentiate and degrade itself under the combined action of light and microorganisms, and eventually become debris, which will be accepted by the natural environment;
If the degradation is not good, it will not be accepted by the environment, thus forming 'white pollution '.
The inspection items of food packaging film mainly include: smooth appearance, no scratches, burns, bubbles and wrinkles, smooth hot air and no virtual sealing.
The film shall not have cracks, pores and composite layer separation. No impurities, foreign matters and oil stains.
Bagged soaking liquid shall not have odor, odor, turbidity and decolorization.