Advancements in IML Technology: Automation, Processes, and Applications
With the increasing automation of injection molding equipment, a new In-Mold Labeling (IML) technology is gaining popularity both domestically and internationally.
Custom IML containers are widely regarded in the industry due to their unique advantages, including high clarity, good three-dimensional effect, scratch resistance, enhanced aesthetic appeal of packaging containers, economic benefits, environmental friendliness, and improved anti-counterfeiting features.
In-Mold Labeling Molding Process and Influencing Factors
Molding Process
There are two types of in-mold labeling molding methods: blow molding and injection molding. For injection molding in-mold labeling, an automatic robotic arm attaches the label to the inner wall of the mold. After the mold is closed, injection molding fills the mold, and the high-temperature resin melts the back of the in-mold label, resulting in the label and container becoming integrated. In Europe, 80% of in-mold labeling is achieved through injection molding.
Influencing Factors
In in-mold labeling technology, the main influencing factors include the label, mold, robotic arm, and molding equipment, with the injection molding production equipment being the most critical.
In-Mold Labeling Application
IML technology has been developed and matured in Europe, the United States, and Japan for many years and is widely applied to various products. In Europe and the United States, the proportion of IML injection molded containers is around 12% or more. Globally, in-mold labeled containers from Honokage are generally divided into two major systems: in North America, blow molding technology is predominantly used for liquid detergents, fabric softeners, personal care, and hair care products; while in Europe, injection molding technology is primarily used for ice cream (such as plastic ice cream box), margarine (such as big margarine container), and butter, with in-mold labeled paint cans also being utilized in Europe. Technological advancements have also made significant breakthroughs, including computer simulation and analysis of the molding process. In-Mold Decoration (IMD) combines forming and molding processes, differing from traditional injection or insert molding, enabling the analysis of two different processes for more reliable predictive results and better performance of the label and molded product.
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