German standard DIN55473 desiccant delivery standard

A, raw materials (adsorbent) performance requirements

inspection item

index

Test or inspection method

PH

3.5~8.5

Determination of aqueous solution PH meter

electrical conductivity

≤0.3S/m

Determination of aqueous solution conductivity meter

Water soluble matter content

≤2.0%

Aqueous solution filtration evaporation method

granularity

≤0.25mm ≤2.0%

≤6.3mm 100%

Standard metal screen screening

Unit moisture absorption capacity

（23℃、40%RH）

≥6g

Testing moisture absorption capacity by dynamic method or constant temperature and humidity box method

The percentage is converted according to the unit weight.

Unit weight ②

≤39g

Before production, formulate the unit weight value according to the percentage of moisture absorption capacity, and produce.

Then confirm the actual unit weight value according to the net weight of the adsorbent in the desiccant bag.

unit volume

≤1125px3

After measuring the bulk density, it is converted according to the unit weight.

B, packaging materials (desiccant bag material, breathable packaging) performance requirements