RFID stickers are the most common RFID tags and the most economical way of RFID application at present. RFID sticker has the advantages of low cost, soft and light, easy to stick, high production and use efficiency, and can be mass production and printing.

　　RFID sticker is usually composed of film, covering material, RFID Inlay, an adhesive layer, and release paper. How to choose the materials for each layer is also a science. Figuring out the structure and material is crucial for us to fully understand the RFID sticker and choose the right RFID sticker for our application.

　　Film

　　The film is usually the top layer of an RFID tag. There are four kinds of film commonly used for RFID stickers: BBOP film, PET transparent film, PVC film, and PE protective film. Different films have different properties, which you can choose according to the application environment and requirements.

　　1、BOPP Film

　　BOPP film is colorless, odorless, tasteless, non-toxic, and features high tensile strength, impact strength, rigidity, strong toughness, and good transparency.

　　However, the surface energy of BOPP film is low, and corona treatment is required before gluing or printing. In addition, BOPP film is easy to accumulate static electricity, no heat sealing, not suitable for glue dropping, but it is common for coated paper digital printing.

　　2、PET Transparent Film

　　PET film features good transparency, gloss, chemical corrosion resistance, and resistance to 150℃ high temperature. Besides, it has excellent mechanical properties. Its strength and toughness are the best of all thermoplastics, and its tensile strength and impact strength are much higher than general films. The film is printable and can be used on surface of RFID epoxy labels.

　　But PET film is not resistant to strong alkali and prone to static electricity.

　　3、PVC Film

　　PVC film is mainly composed of PVC, but there are some other ingredients to enhance its heat resistance, toughness, ductility, etc. Its temperature resistance is about 80 ℃. Compared to the ordinary adhesive film, PVC film is not easy to fall off, owning to using a special vacuum film press at 110℃ temperature to adhere to the surface of the plate. PVC film is printable and can able to use on the surface of RFID epoxy labels.

　　Disadvantages: not easy to decompose, not environmentally friendly.

　　4、PE Protective Film

　　The protective film is made of special polyethylene (PE) plastic film as the substrate. According to density difference divided into high-density polyethylene protective film, medium density polyethylene, and low-density polyethylene. PE protective film features excellent flexibility, environmentally-friendly, and recyclable. It can prevent the tag’s surface from being polluted, corroded, or scratched during packaging production.

　　Disadvantage: heat resistance is poor (60-70 ℃).