1. The welding time is not enough and the welding is not complete.
2. The lengths reserved for the welding ports of the strapping straps are uneven, and the eight straps are strapped unevenly, resulting in uneven stress.
3. If the welding time is too long, a virtual welding will be formed, or the strapping will become thinner and the tension will be reduced.
4. The welding port of the wrapping film packaging machine is not aligned, the left and right are misaligned, the overlapping area is reduced, and the pulling force is reduced.
