Judging the qualification of food packaging bags in four aspects
The reason why food packaging bags are popular in the market today is that they are a very important part of the food industry. They can even be regarded as indispensable for the food industry, and they are essential for daily life. The quality of a food packaging bag can directly affect the product. It is accompanied throughout the entire process of food production, circulation and application. Today, Jiangsu Shenkai Packaging will briefly introduce how to judge whether a food packaging bag is qualified or not from four aspects.
1. Appearance must not be obstructed by the use of air bubbles, perforation, water lines, violent tendons, poor plasticization, fisheye deadlock and other rickets. Specifications width, length, thickness deviation should be within the specified deviation range.
2, physical and mechanical properties, including tensile strength, elongation at break, it is to reflect the ability of the product to withstand stretching during use, if this is not qualified, during the use of food packaging bags (film) is prone to rupture, Damage phenomenon.
3. Hygienic properties include evaporation residues (acetic acid, ethanol, n-hexane), consumption of potassium permanganate, heavy metals, and decolorization tests. Evaporation residue is a reflection of the possibility that food packaging bags will precipitate residues and heavy metals when they are in the process of using vinegar, wine, oil and other liquids. Residues and heavy metals will have adverse effects on human health. In addition, residues will directly affect the color and fragrance of food. , taste and other food quality.
4. The degradation performance can be divided into photodegradation type, biodegradation type, and environmental degradation type according to the degradation type of the product. The degradation performance reflects the ability of the product to be accepted by the environment after being discarded. If the degradation performance is good, the bag (membrane) will break, differentiate and degrade spontaneously under the combined action of light and microorganisms, and eventually become detritus and become a natural environment. Accepted; If the degradation is not good, it will not be accepted by the environment, resulting in "white pollution."