Adhesives and Protection for RFID Labels in Production & Logistics

1. Applications in Production & Logistics

In the area of production and logistics, various components and work steps can be simplified through the use of RFID labels.

The individual product or general cargo can be registered automatically during goods receipt and goods issue. This prevents incorrect loading.

With regard to warehousing, inventory checks can be carried out at the push of a button. A fast pallet localisation as well as an automatic of all incoming and outgoing goods is also possible.

In addition, an efficient swap body identification can be realized by automatic access recognition and real-time data transfer to a transport planning system. In this way, optimized container deployment planning takes place and the suppliers already know where their freight is to be loaded when they arrive.

By using RFID technology, personnel costs can be reduced and error rates in order fulfillment can be reduced. It can also reduce annual inventory costs and improve the quality of inventory information.

2. Problems with using RFID tags

RFID transponders are characterized by sensitive electronics. Goods with a high proportion of metal or water cause a disturbance of the electromagnetic field, whereby the data often cannot be read out completely or only incorrectly.

In addition, the self-adhesive labels are equipped with an adhesive that is not fully compatible with all substrates or is not resistant to moisture or chemical influences. This can lead to a reduced adhesive strength, so that the chip becomes detached from the carrier or the goods and can lead to the loss of the data.

In addition, RFID tags in their usual form are usually not resistant to shocks or vibrations, so that damage within the storage and transport chain is possible.

3. Influence of Materials & Surfaces on RFID Labels

(A) Backgrounds + application of RFID tags: The material on which the transponder is attached to the workpiece or packaging unit has a major influence on its functionality. The function of the RFID system can be severely impaired if an unfavourable material such as metal is used.

(B) A spacer material is therefore always used if the application material cannot be applied directly to the transponder. This can be a self-adhesive foam, for example.

(C) The air interface material is the material located between the transponder and the read & write device (D). This can be, for example, an applied protection of the transponder up to a partition wall, which impairs the writing & reading range.

The reading range is influenced differently depending on the material. In the worst case, the transmitting power of the transponder can even be completely absorbed or reflected.

4. Influence of environmental conditions on RFID tags

Sensitivity to water and liquids: Reflections when sending and reading data or complete defect of the electronics.

Mechanical loads: Damage and detachment of the transponder due to shocks, vibrations, pressure, friction or shear forces.

Chemical loads: E.g. by oils, greases, cleaning agents, lubricants, alkalis, acids, surfactants and solvents.

Thermal loads: Damage caused by very high or low temperatures on site.

Weather-related influences: Influence of rain, fog, humidity, frost or sea air on communication between transponder and reader/writer.

5. RFID Solutions from Krückemeyer

The right adhesive and substrate for applying the RFID transponder

  •     Self-adhesive equipping of RFID transponders
  •     A variety of adhesives for different substrates
  •     Long-term bonding with arylate foam adhesive tapes for reusable packages
  •     use of self-adhesive foams and other materials as spacers to the substrate material
  •     Resistant self-adhesive foams against mechanical, chemical, thermal and weather-related loads

The right materials for the surface protection of RFID transponders

  •     Equipping with self-adhesive foams and other materials to protect against shocks, vibrations, pressure, friction or shear forces
  •     Lamination of the transponder for protection against liquids
  •     Equipment to protect against chemical loads such as oils, cleaning agents, lubricants, alkalis, acids, surfactants and solvents.
  •     Protection against thermal loads and weather-related influences by self-adhesive foams

Dimensions and geometries on request

  •     Cutting of materials to individual width and length
  •     Production of individual geometries as self-adhesive die-cut parts
  •     Register-precise punching without destroying the sensitive transponder electronics
  •     Automatic quality control