Matters needing attention when PE protective film is die-cutting

When die-cutting PE protective film, the face material and the adhesive need to be cut through together, but in theory, die-cutting paper materials is the combined result of tool cutting and paper force fracture, that is, the cutting edge of the blade will also cut the paper to both sides. extrusion. Therefore, relatively speaking, the die-cutting accuracy of paper materials is not very high. When analyzing samples, it is often seen that some labels have burrs, which is due to the phenomenon of natural fracture due to the thicker fibers of the material. Based on the die-cutting characteristics of paper materials and considering the wear of the blade, the angle of the flat die-cutting blade is 52°. If the angle is large, the extrusion deformation of the material will be large, that is, the horizontal tendency The discriminative force will aggravate the phenomenon of material fracture discrimination. When die-cutting PE protective film, because most of the film materials have toughness and will not break naturally, it is not suitable to cut through two-thirds of the thickness. It needs to be completely cut through or four-fifths of the thickness. will be peeled off along with the label. The strength of the surface material of the PE protective film is related to the thickness of the surface material, the fiber (polymer) structure and its own humidity. In the die-cutting process, the most important factor related to the surface material is the waste discharge speed. The higher the humidity, the weaker the strength of the material itself after it gets wet, and then it will be broken at will, and it may not be able to be discharged. When designing the layout, according to the strength of the PE protective film, through the implementation of the reasonable arrangement of the waste size and waste discharge speed of the label, it can not only improve the production efficiency, but also increase the waste of materials. The thickness of the PE protective film The thickness of the material directly affects the depth of die-cutting. The thicker the material, the more random the die-cutting is. Because the thicker the material, the greater the tolerance of the die cutting, the less chance of cutting through the liner. Relatively speaking, the material is thin, and defects of cutting through the liner appear randomly.