There are several types of inspection items for food packaging bags (films)

[China Packaging Network News] Food packaging bags (film) inspection items are mainly divided into five categories:

Appearance must not be obstructed by the use of air bubbles, perforation, water lines, violent tendons, poor plastic, fisheye deadlock and other rickets. Specifications width, length, thickness deviation should be within the specified deviation range.

The physical and mechanical properties include tensile strength and elongation at break. It reflects the ability of the product to withstand stretching during use. If this item fails, the food packaging bag (film) is prone to cracking and damage during use. .

Test items are mainly divided into five categories:

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 of precipitation of residues and heavy metals in food packaging bags in the course of use, such as vinegar, wine, oil, etc. Residues and heavy metals will have adverse effects on human health, in addition, the residue will directly affect the color and fragrance of food. , taste and other food quality.

The degradation performance can be divided into photodegradation type, biodegradation type, and environmental degradation type depending on 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."