Pattern correction of polymer protective film

Before modifying the surface pattern of the polymer protective film wholesale product, the horizontal and vertical shrinkage rate of the material and the allowable deformation error in each direction of the contracted decorative text must be considered to ensure the correct recovery of the pattern, text, and bar code contracted into the container. The materials used to protect film sets of labels must focus on three factors: environmental protection requirements, film thickness, and shrinkage performance. The basis for determining the thickness of the film is the application field and cost factors of the label. Of course, price is not a decisive factor. Because of the particularity of each film, users and trademark printers must clarify the technologies suitable for the film and materials used before the contract. In addition, the indicators required by the processing equipment and other process factors also directly affect the choice of thickness. Generally, the thickness of the film used to make the film jacket label is 30 to 70m, of which 40m and 50m films are mostly used. In addition, there are corresponding requirements for the shrinkage of the film, and the shrinkage in the transverse direction is higher than the shrinkage in the longitudinal direction. The transverse shrinkage rate of commonly used materials is 50% to 52% and 60% to 62%, especially 90%. The longitudinal shrinkage rate is required to be 6% to 8%. When making shrink film covering labels, please try to choose materials with small longitudinal shrinkage. Next: The practice of PE heat shrinkable filmPrevious: PE heat shrinkable film has a higher shrinkage rate