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

inspection item

index

Test or inspection method

Dust prevention

Type a: ≤10mg/u

With package drop test, dust is collected and weighed.

Type b: ≤1mg

Moisture absorption rate

23℃、40%RH

≤16u： ≥0.25g/7h·u

Dynamic adsorption with packaging for 7 hours to test weight gain

32u： ≥0.1 g/7h·u

Printing and marking

At least the following contents shall be printed:

Weight is not allowed to be marked

visual

C. Packaging bag (barrier packaging)

inspection item

index

Test or inspection method

Water vapor permeability

23℃、85%RH

≤0.5g/m2·24h

Measurement of water vapor permeability by electrolysis

Humidity indicator card

8% cards per bag

visual

Printing and marking

The following contents shall be printed (in English and German):

If only part is extracted, the package should be sealed immediately.

Shanghai Bozhao Desiccant Manufacturing Co., Ltd. has more than 20 years of industry experience. Its products have passed environmental protection testing and dimethyl fumarate testing, and can provide SGS and DMF testing reports. In 2022, it passed the German DIN55473 certification with high quality requirements in the desiccant industry. The company adheres to the business philosophy of "customer first, forge ahead" and adheres to the principle of "customer first" to provide quality services to our customers, and is determined to coexist with customers and win-win.