Advantages of In-Mold Labeling

In-mold labeling materials are required to have good printability: the selection of in-mold labeling materials is very demanding. Ordinary label synthetic paper has poor surface smoothness, low strength, small elastic deformation, and difficulty in high-grade color printing. Suitable for large-area applications of barrels. Paper labels are easily deformed when exposed to water or moisture and reduce their use value. However, they are less affected by static electricity when used, and the loss when blowing the bottle to absorb the label is relatively small.

 Paper labels and plastic bottles are not the same material, which is not conducive to bottle recycling. The film material is a special multi-layered co-extruded surface material with a smooth surface that can be printed using a variety of printing methods. It will be deformed during label processing and will not cause overprinting or die-cutting problems. Some film materials can stretch, shrink and deform. When applied to bottles, they can deform according to the shape of the bottle. After being compounded to the surface of the bottle, the label will not wrinkle because the oil will not penetrate into the surface of the film material. Under the circumstances, the in-mold stickers printed with film materials are brighter in color and have much better color effects than paper materials. Now, plastic film-type in-mold stickers are generally used at home and abroad.

 In-mold labeling requires good printability, so that the powder in the oil can be firmly attached to the surface of the material. It must have good processing suitability during post-processing, and is suitable for die-cutting and cold foil stamping. The in-mold sticker material also needs to have good usage characteristics and can be integrated with the plastic bottle during blow molding. The in-mold material structure consists of a printing surface, an intermediate layer and an adhesive layer. The function of the printing surface is to accept the oil and form colorful graphics and text: the middle layer supports the printing surface, giving the material sufficient stiffness and transparency, and does not deform under the influence of the printing press and high temperature, ensuring accurate overprinting. The adhesive layer melts under the action of temperature, making the in-mold sticker material and the plastic container integrated, ensuring that the in-mold sticker and the plastic bottle are firmly adhered together. There are two structures on the surface of the adhesive layer: flat non-reticulated structure and reticulated structure. When used without a mesh structure, it is in direct contact with the blank and naturally exhausts, so it is suitable for small-area in-mold pasting.

The surface of the adhesive layer of the textured paper is embossed with the adhesive layer of the texture structure. When labeling, the gas between the in-mold sticker and the bottle body is exhausted through the exhaust channel of the texture. The generation of bubbles is reduced, and the glue layer also has antistatic properties. It also has antistatic properties. To prevent double sheets from appearing during printing, the adhesive layer should also have certain sliding properties to ensure smooth separation of in-mold labeling so that printing and processing can proceed smoothly.