Factors of winding tightness of color printing film slitting machine

The film winding tightness is mainly affected by many factors, including the parameter setting of the Lipu slitting machine, the physical properties of the film, the winding speed setting, the operator's proficiency level and work assessment, etc. Too loose or too tight will affect the film quality.
When the tightness is appropriate, fluctuations in material thickness will not affect the winding process of the slitting machine. When the film is rolled up too tightly, due to the tolerance issues of the color printing film itself, the thicker parts will superimpose and form bulges during the rolling process, affecting product quality. This subtle deviation is often difficult to find during the slitting process. Rewinding too tightly may also cause some color printing films or primer products with high surface tension to have adhesion problems, causing the printing pattern to fall off and be defective, and ultimately scrapped.
In addition, if the surface of the paper core is too rough, pits or initial wrinkles will appear due to excessive winding. During the high-speed operation of the color printing film slitting machine, if the film is rolled too loosely, it will cause string movement or end face misalignment. In addition, core pulling will occur near the paper tube during transportation, seriously affecting the appearance and quality.
Rewinding too loosely can also cause wrinkles or star-shaped lines on the end surface of the film. Due to the reduction in the support force of the coil end points, fish scale-like end wrinkles will also appear. The phenomenon of eccentric winding is also caused by the winding being too loose, which causes the film to roll into an oval shape. Uneven tension occurs during unwinding, which affects the product effect.