When browsing supermarkets, have you noticed this type of packaging: the label of the plastic bucket is seamlessly integrated with the bucket body, and you cannot feel any protruding edges; even if the pattern on the skincare bottle is repeatedly wiped with wet wipes, it will not fade or curl? Behind these packaging that "combine appearance and durability" is the key process — in-mold labeling (IML).

As the "invisible upgrader" of the packaging industry, in-mold labeling has widely penetrated into food, daily chemical, maternal and infant, and other fields. Traditional labeling is "first bottle, then label" (first produce blank containers, then paste with glue); while in-mold labeling is "label and container molded synchronously", essentially "the label is born together with the container," making the label seem to directly "grow on the container."

Cut the designed labels (mostly PET or PP material, with high-temperature resistance and tensile resistance) into sizes suitable for the mold. Some labels are also treated with anti-static and anti-adhesion treatments, ensuring smooth automated transportation and grasping.

The automated robot precisely sends the preprocessed labels to specific positions in the mold, ensuring the printing side faces inward (to avoid wear) and the blank side faces outward (for subsequent tight bonding with molten plastic).

Inject high-temperature molten plastic (such as PE, PP, etc.) into the mold. During cooling and solidification, the plastic deeply fuses with the blank side of the label, and the label is directly "embedded" in the container surface—upon mold opening, it is a complete labeled finished product.