The so-called in-mold label is to put the printed label label image sheet (with hot-melt adhesive on the back) directly into the mold area in the plastic mold machine, and combine the label and the container by blow molding or injection to form a complete package. container. The biggest feature of using an in-mold label container is that the label and the bottle are on the same surface. It feels that the color graphics of the label are printed directly on the surface of the bottle.
effect
in mould labels, as a new form of label packaging, have been popular in developed countries in Europe and America for many years. In recent years, it has also been favored by more and more printing substrate suppliers, label manufacturers and end consumers in China. In-mold labels are mostly used for food packaging trademarks and label descriptions, and play an important role in food logistics, anti-counterfeiting, and identification. In-mold labeling is a promising new technology in China. Its promotion replaces the labeling machine, reduces the production cost of manufacturers, improves the recycling rate of food packaging (containers), reduces food inventory, and shortens The production cycle has been improved, and the production efficiency has been improved. It is welcomed by people in the food and packaging circles.
Craftsmanship
The principle of making in-mold labels is to print printed paper, composite or film labels with a special hot-melt adhesive on the back and place them in the model before plastic blowing, injection molding or thermoforming to create plastic bottles or basins.
How to make in-mold labels
First, place the label on the inner wall of the mold; then, insert the air-absorbing plastic tube into the inner wall of the mold that wraps the label until the mold is completely closed, so that air fills the entire space inside the closed mold; finally, the heated plastic expands quickly and presses against the inner wall of the mold , Fix the label on the bottle, and the finished bottle comes out of the mold.
Label materials require good printability
The choice of in-mold label materials is very particular. The surface of ordinary label synthetic paper has poor smoothness, low strength, low elastic deformation, and difficulty in high-grade color printing. It is suitable for large-area applications of barrels. Paper tags are prone to deformation and reduce their use value when they are exposed to water or moisture, but they are less affected by static electricity, and the losses when blowing labels to blow the bottles are relatively small. Paper labels and plastic bottles are not the same material, which is not conducive to the recycling of the bottle. The film material is a special multi-layer co-extruded surface material, which has a smooth surface and can be printed by various printing methods. Deformation f during label processing will not cause overprinting and die cutting problems. Some film materials can be stretched, shrunk and deformed. When applied to the bottle body, it can deform with the shape of the powder bottle body. After compounding on the surface of the bottle body, the label will not wrinkle. Material printed labels have a brighter color and a much better color effect than paper materials. At present, plastic film-based in-mold label materials are generally used at home and abroad.