In mold labeling (IML) is an advanced method for decorating plastic containers that has become widely adopted over the past decade. It is especially suitable for fully automated production lines. When an injection molding machine or blow molding machine is equipped with an in mold labeling system, a preprinted label is placed into the mold and permanently fused to the plastic part during molding. This eliminates secondary labeling processes and helps reduce production steps while significantly increasing output capacity.
How In Mold Labeling Improves Efficiency
With in mold labeling, decoration is integrated directly into the molding cycle. There is no need for additional operations such as adhesive labeling, shrink sleeves, or post-printing. As a result:
- Production processes are simplified
- Cycle times are reduced
- Overall production capacity is increased
- Automation levels are improved
This makes in mold labeling an ideal solution for high-volume plastic container production.
Environmental Benefits of In Mold Labeling
A major advantage of in mold labeling is its environmental friendliness. Because the label is fused with the plastic container, it does not peel off during use. The label’s waterproof and dirt-resistant properties make the product more durable and reusable.
When IML is applied to disposable products, there is no need to remove the label from the container before recycling. Container and label can be processed together, which:
- Simplifies the recycling process
- Reduces carbon emissions
- Creates a positive impact on environmental protection
Types of In Mold Labels: Injection and Blow Molding
In mold labels can generally be divided into two main types:
- IML for injection molding machines
- Label surface textures after injection can be glossy, matte, or orange-peel.
- Suitable for a wide range of plastic containers.
- Available in different thicknesses to match various in mold labeling systems.
- IML for blow molding machines
- Label surface is typically matte.
- Commonly used for motor oil bottles, laundry detergent bottles, and other plastic bottle products.
Both types of in mold labeling are compatible with PP and PE materials. However, before selecting the right IML type, it is essential to confirm which label structure and material specifications are compatible with your specific labeling system, as injection IML and blow molding IML use different raw material constructions.
By choosing the correct in mold labeling solution for your process and materials, manufacturers can achieve high-quality decoration, improved efficiency, and more sustainable plastic packaging.