Packaging bags, as everyone knows, are used for everything we buy. But do you know how to determine if the quality of a packaging bag is up to standard?

        Packaging bags, everyone knows, because we buy anything will have packaging bags, so do you know whether the quality of packaging bags is qualified?

        1. The appearance shall not have bubbles, punctures, watermarks, burst muscles, poor plasticization, fish eyes, lumps and other defects that hinder the use. The deviation of the specification width, length and thickness shall be within the specified deviation range.

        2. Physical and mechanical properties include tensile strength and elongation at break. It reflects the ability of the product to withstand tensile stress during use. If this item is unqualified, the food packaging bag (film) is prone to breakage and damage during use.

        3. Hygiene performance includes evaporation residue (acetic acid, ethanol, n-hexane), potassium permanganate consumption, heavy metals, and decolorization test. Evaporation residue reflects the possibility of residue and heavy metals being precipitated from food packaging bags when they encounter liquids such as vinegar, wine, and oil during use. Residues and heavy metals will have adverse effects on human health, and residues will also directly affect the color, aroma, and taste of food.

        4. Degradation performance According to the different degradation types of products, it can be divided into photodegradable type, biodegradable type, and environmental degradation type. 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, decompose and degrade under the combined action of light and microorganisms, eventually becoming debris, and being accepted by the natural environment; if the degradation performance is not good, it will not be accepted by the environment, thus forming "white pollution".