PET (polyethylene terephthalate) bottles are commonly labeled using various methods, and the choice of labeling depends on factors such as the type of product, design preferences, and production requirements.
Pressure-sensitive labels (PSL): These are adhesive labels that can be applied to the surface of PET bottles. PSLs are popular for their versatility, ease of application, and ability to accommodate various label shapes and sizes.
Shrink sleeve labels: Shrink sleeves are labels made from plastic film materials that shrink tightly around the contour of the PET bottle when heat is applied. This type of labeling provides a 360-degree coverage, allowing for more design space and better aesthetics.
In-mold labels (IML): In-mold labeling is a process where labels are placed in the mold before the PET bottle is formed. During the molding process, the label becomes an integral part of the bottle, resulting in a seamless, durable, and tamper-evident label.
Direct printing: Some PET bottles are labeled using direct printing methods, such as inkjet or thermal transfer printing. This approach eliminates the need for separate labels and can be a cost-effective option for large production runs with simple designs.
Sleeve labels: Sleeve labels are similar to shrink sleeves but are not applied directly through heat. Instead, they are slipped onto the PET bottle like a sleeve and then secured in place through other means, such as adhesives or heat.
Roll-fed labels: Roll-fed labels are applied to PET bottles during the manufacturing process. Labels are usually in the form of a continuous roll, and they are cut and applied to each bottle as it moves along the production line.
The choice of labeling method depends on factors such as the desired visual appeal, production speed, cost considerations, and the characteristics of the product being packaged. Each labeling method has its advantages and may be more suitable for specific applications.
