Film Labeling on Die-Cut Quality Control

We have encountered such cases: two kinds of self-adhesive materials with the same surface material and different backing papers, processed on two labeling devices at the same time, resulting in die cutting on high-precision equipment, and the die-cutting quality of the two materials is normal. In die-cutting machines with low precision, poorly fiber-backed materials often have problems and cannot be produced normally. This case shows that the quality of die-cutting is related to the self-adhesive material itself, and it is also related to the precision of the equipment.

1) Do not die-cut film materials with die-cut sheets that have been die-cut. Because the edges are worn, they are not suitable for die-cutting the film.

2) When flattening and die-cutting, try to reduce the die-cutting area: especially full-size small labels, because the layout is large and the rows of tools are many, and the quality is difficult to guarantee.

3) The pad plate should be changed frequently during the flattening and die-cutting, especially for the long plate, because the cut marks will affect the die-cutting quality of the new label.

4) Always check the quality of die-cutting, especially the label of the automatic labeling. In order to avoid the emergence of large quantities of quality problems. The specific inspection method is to use a signal pen on the bottom paper to check the penetration of the cut paper.

5) Die-cutting large-area, complex-patterned labels requires a professional manufacturer to make a die-cut version, which ensures die-cutting accuracy.

6) To maintain the sharpness of the blade, create a file and record the use of each die-cut version so that the blade can be replaced in time.

7) Use a small angle. High hardness dedicated blade die cutting film adhesive material, especially PET material.

The diversified development of the label printing factory The market trend of non-paper label (N. Paper Label) gradually formed due to the improvement of film surface printability and the perfection of UV drying technology. Faced with the increasingly fiercely competitive label market, label printers need to consider stabilizing or expanding their business volume and take a diversified development path to develop more label types such as film labels.

Printing materials Self-adhesive label materials are composed of surface materials, adhesives, and backing papers. According to the different surface materials, they can be divided into paper adhesive materials and film adhesive materials. The surface materials of film adhesive materials include polyester (PET) film, biaxially oriented polypropylene (BOPP) film, vinyl chloride (PVC) film, polyethylene (hospital) film, and low density polyethylene (LDPE) film.

The surface material of the film adhesive material is similar to or substantially the same as the film label material, but the self-adhesive material and the film material have essential differences in print adaptability. If you need to use adhesive label printing equipment to print film labels should pay attention to the impact of printing materials on the printing process.

1) Because of the support of the backing paper on the adhesive material, the stiffness is large and the dimensional stability is good: the film stiffness is small, the dimensional stability is poor, and the tension of the film must be controlled during printing. The tension control system of the printer is required to have Larger adjustment range, the tension is too small, the film tends to appear lateral folds during the printing process, misprints and other issues; too much tension, it will cause the paper roll to stretch and appear imprinted, or even pull off the roll, Affect the smooth progress of printing.

2) The absorption of ink on the surface of the film is poor, and the surface of the film should be processed before printing, such as corona treatment, surface coating and other printing methods.