What kind of food packaging bags are qualified

Today in the food industry, food packaging bags are an indispensable part. The quality of food packaging bags will directly affect the quality of products, so what kind of food packaging bags are qualified? Let’s briefly explain.

1. The appearance should not have defects such as bubbles, water marks, perforations, etc., and the width, length, and thickness deviations of the specifications should be within the specified deviation range.
2. Physical properties, including tensile strength and elongation at break, reflect the ability of the product to withstand stretching during use. If this item is unqualified, the food packaging bag (film) is prone to rupture during use. damage.
3. Hygienic performance, including evaporation residues (acetic acid, ethanol, n-hexane), potassium permanganate consumption, heavy metals, and decolorization tests. Evaporation residues reflect the possibility of residues and heavy metals precipitated out of food packaging bags when they encounter vinegar, wine, oil and other liquids during use. Residues and heavy metals will have adverse effects on human health. In addition, residues will also directly affect the color and aroma of food. , taste and other food quality.
4. Degradation performance, according to the different types of product degradation, 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 (film) will break, differentiate and degrade by itself under the combined action of light and microorganisms, and eventually become debris, which is a natural environment. Accepted; if the degradability is not good, it will not be accepted by the environment, thus forming “white pollution”.

The inspection items of food packaging film mainly include:
The appearance should be smooth, free from scratches, burns, bubbles 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.