Meaning
German technical standard that specifies the requirements, testing procedures, and supply conditions for desiccant bags used in packaging defines how moisture-absorbing units must perform. This regulation, known as DIN 55473, establishes a standardized measure called a desiccant unit. It ensures that desiccants from different manufacturers can be compared directly on their performance.
Performance Standard
Testing under this standard requires that desiccant bags maintain their physical integrity and do not release dust or harmful chemicals during use. The standard defines different classes of desiccant bags, such as dust-tight and low-dust versions, to suit various industrial needs. Manufacturers must prove that their bags can absorb a minimum amount of moisture at specific humidity levels before receiving certification.
This rigorous testing guarantees that certified bags will perform reliably in sensitive electronic or pharmaceutical packaging.
Unit Definition
The concept of a desiccant unit simplifies the calculation of the required moisture protection by creating a standard measure of absorption capacity. Instead of specifying the weight of the desiccant, which varies depending on the material used, the standard DIN 55473 uses the number of units as the reference point. This approach allows packaging designers to specify a target number of units, regardless of whether they are using silica gel, bentonite clay, or other active agents.
It removes confusion and ensures consistent protection across different material suppliers, helping to build a highly reliable supply chain.
Supplier Verification
Buying desiccant bags that comply with this standard protects manufacturers from using sub-standard moisture control products. Suppliers must undergo audit procedures and display the standard mark on their packaging to demonstrate compliance. If a shipment is secured with non-certified desiccants, the lack of a verified absorption rate makes the shipment vulnerable to unexpected moisture damage.
This standard provides a clear benchmark for quality assurance.
