The Die-Cutting Process for Glass Protection Films

In the die-cutting process, the glass protection film needs to be cut at the same time as the face material and adhesive, but theoretically, die-cutting paper-like materials is the combined result of tool cutting and paper force fracture, that is, the knife blade downward cutting will also squeeze the paper, therefore, relatively speaking, the die-cutting accuracy of the paper-like materials is not high. Sample analysis often found on some labels has burrs, which is due to the raw material fiber being relatively coarse, and the composition of the ingredients caused by the natural fracture.

Glass protective film is based on the die-cutting characteristics of paper-based materials, and taking into account the wear and tear of the knife blade, PE protective film manufacturers flat die-cutting knife angle of 52 °, assuming that the angle is larger, the extrusion deformation of the material is more significant, that is, the horizontal direction of the regional component force will make the material fracture distinction phenomenon intensified. As most of the film-type materials have toughness and will not naturally fracture, cutting through two-thirds is not appropriate to completely cut or cut the thickness of four-fifths in order to cut; otherwise, the row of waste will be peeled off together with the label.

Glass protective film surface material strength and surface material thickness, fiber (macromolecule) structure, and humidity. In the die-cutting process of PET protective film material, the main factor related to the surface material is the speed of slagging. The greater the humidity of the situation, manufacturers of PE protective film after moisture, the weaker the strength, randomly pulling off, and even can not be discharged.

Glass protective film uses its face material thickness. The material thickness will directly affect the depth of the die-cutting; the thicker its material is, the more die-cutting it will be. Because the denser the material, the higher the precision of die-cutting, so the smaller the chance of cutting through the base paper. The thinner the material, the more casual the cutting through of the defects. Distinguish between the face material and base paper; for example, it can be 80g/m2 and 60g/m2, in line with the table flat pressure label die-cutting machine. The research found that 80g/m2 material die-cutting waste is normal; switching to 60g/m2 material, die-cutting often causes waste breaks, the base paper is cut, loss of labeling, and other phenomena, requiring frequent stoppages and pad plate.