How to detect qualified packaging steel strips

Packaging steel belt is an indispensable part of my country's logistics and transportation. At present, the development space of packaging steel belt in our country is huge, and the industrial chain production prospect is good. In recent years, there are more and more small and medium-sized enterprises processing and producing packaging steel belts, and the quality of their products is uneven. In this case, how to detect qualified packaging steel belts is the most concerned issue of many users.
　　 1. Visually inspect the appearance, color and surface quality of the packaging steel strip, and measure the size with corresponding precision measuring instruments or general measuring tools.
　　2. When measuring the bend of a sickle, place the tested part of the steel strip on the platform, and use a one-meter straight ruler against the concave edge of the steel strip to measure the maximum distance from the meter ruler to the concave edge.
　　3. The coating thickness of the packaging steel strip and the coating thickness of the galvanized steel strip are measured with corresponding precision measuring instruments. The measuring position should be no less than 3mm away from the edge of the steel strip, with approximately equal intervals, and the length should be no less than 10mm. Measure three points on each side, and the arithmetic average of the six test values u200bu200bis the paint film thickness or coating thickness.