Heat shrink labels belong to thermoplastic film, in the production process will be stretched orientation, and the use of the process will be subject to thermal contraction. Because of its susceptibility to tension changes in the printing process, resulting in overprinting is not allowed, so in the printing process should pay close attention to the control of tension, to maintain the stability and balance of tension. Next, we will learn together about the heat shrinkable label printing tension control requirements:

1, the size of the tension adjustment, usually according to the film type and tensile strength, if the film tensile strength is weak, easy to stretch deformation, then the tension should be a little smaller; if the film tensile strength is strong, then the tension can be correspondingly large;

2, in the case of the same type of film, the width and thickness of the material is also an important factor in determining the size of the tension, the wide film should be larger than the narrow film tension, the thicker film than the thinner film tension.