In-mold labeling is mainly used for blow molding and injection molding products of PP, PE, PET and other materials. That is, before blowing and injection molding, put the printed in-mold paste into the blowing and injection molding cavity. When the mold is closed for blowing and injection, the special adhesive is attached to the mold through the action of high temperature and high pressure in the mold. The glue melts and fuses with the surface of the bottle body or injection part. When the mold is opened, a beautifully printed bottle body or injection part is completed at one time.