PVC heat shrinkable film printing method

PVC heat shrinkable filmis easy to break when printing. It is not that the quality of PVC heat shrinkable film is not good, but that there is a solvent in the PVC printing ink used that will dissolve the PVC film, and this solvent has low volatility. Therefore, if If the solvent content of PVC dissolved in the solvent of PVC ink is too much, the PVC heat shrinkable film will be dissolved and torn during the printing process. However, if the printing ink for PVC is not used, the printing fastness is not good.

PVC heat shrinkable film is mainly used for food and beverages. Based on the principle that PVC heat shrinkable film is harmless and clean, it is used for outer packaging. It has elegant appearance, smooth, transparent, strong toughness, and good sealing. Moisture-proof, loss-proof, and pollution-proof have technical functions, and are deeply loved by manufacturers. PVC heat shrinkable film is not only used in food, but also in cosmetics. PVC heat shrinkable film is ideal for high cosmetic packaging, so PVC heat shrinkable film has an important position in our daily life.

PVC heat shrinkable film is a thermoplastic film that is stretched during production and shrunk by heat during use. Therefore, no matter which printing method is used, before designing the surface pattern, the PVC heat shrinkable film manufacturer should consider the lateral and longitudinal shrinkage of the material, as well as the allowable deformation error in all directions after shrinkage, so as to accurately reduce the pattern on the container , characters and barcodes.

1. The direction of the pattern

Regardless of whether the PVC heat shrinkable film adopts gravure printing or flexographic printing, its printing is mainly in the printing method, and the direction of the pattern on the printing plate should be positive. Nowadays, there are also PVC heat shrinkable films printed on the surface. In this case, the direction of the pattern on the printing plate should be reversed.

2.the level of the pattern

Limited by the shortcomings of flexographic printing, if flexographic printing is used for PVC heat shrinkable film, the image level should not be too delicate, while gravure printing can require richer image levels.

3. Size design

The lateral shrinkage rate of the PVC heat shrinkable film material used for printing is 50%-52% and 60%-62%, in special cases it can reach 90%, and the longitudinal shrinkage rate is required to be 6%-8%. However, when the film shrinks instantaneously, due to the limitation of the container, it cannot shrink completely in the horizontal and vertical directions. In order to determine the accurate restoration of the shrinking pattern, text and barcode, it is necessary to consider the shape of the container. The PVC heat shrinkable film is calculated according to the actual situation. size and deformation rate. For shrink labels that need to change the sheet film into a tube and use an adhesive to seal the superimposed parts together, it should be noted that generally no graphics are designed on the sealed part to avoid affecting the bonding fastness.

4. Arrangement of barcodes

Usually, the direction of placing the barcode should be consistent with the direction of printing, otherwise the lines of the barcode will be distorted, which will affect the scanning results and cause misreading. In addition, the color selection of label products should be based on spot colors as much as possible, and the production of white version is required, which can be made into full version or hollowed out according to the actual situation. The color of the barcode should follow the general requirements, that is, the color matching of bars and spaces should conform to the principle of barcode color matching. Printing material selection. The printing of heat shrinkable labels has been briefly analyzed above. In addition to controlling the printing process, the material plays a decisive role in affecting its quality. Therefore, choosing the appropriate material is key.

PVC heat shrinkable film is also one of many packaging films. Whether it is a regular product or an irregular product, PVC heat shrinkable film can be used.

1. When using the PVC heat shrinkable film, check whether there are any puncture holes on the surface of the PVC heat shrinkable film. Everyone should know that the surface of the PVC heat shrinkable film is changed to puncture some small holes, so that the gas inside can pass through small holes during shrinkage. Holes come out.

2.It depends on the quality of the PVC heat shrinkable film. When we choose PVC heat shrinkable film, we must choose good quality PVC heat shrinkable film, so that we can meet the shrinkage requirements when shrinking.

3. Another thing is to check whether the temperature is appropriate. The PVC heat shrinkable film manufacturer reminds everyone that the PVC heat shrinkable film must reach a certain temperature when shrinking, so it depends on whether the temperature meets the requirements.