
ISO 2528: Determination of Water Vapor Permeability of Materials
The ISO 2528 standard specifies a method for determining the water vapor permeability of materials. This standard is crucial for assessing how materials allow moisture to pass through, which is significant for numerous applications in the packaging and construction industries. Compliance with the ISO 2528 standard ensures that materials effectively act as barriers against water vapor, thus maintaining the quality and durability of products.
Key Testing Methods in ISO 2528
The ISO 2528 standard includes various methods for accurately measuring water vapor permeability:
Gravimetric Method
This method determines permeability by measuring the weight of water that passes through the material over a defined period. It allows precise determination of the permeability rate under controlled conditions.
Capillary Method
This method investigates the material’s ability to transport water through capillarity. It is particularly useful for porous materials and helps to understand the interaction between water and the material.
Application Areas of the ISO 2528 Standard
The ISO 2528 standard is important in various fields, including:
Packaging Industry
The standard is critical for developing packaging that ensures moisture protection for food and other sensitive products.
Construction Industry
For building materials, compliance with the ISO 2528 standard is essential to meet moisture barrier requirements.
Textile Industry
In the textile sector, the standard is used to test the water vapor permeability of fabrics, which is significant for developing breathable materials.
ISO 2528-Certified Machines
Here are machines suitable for testing according to the ISO 2528 standard:
- With GraviTest the determination of water vapour transmission rates of polymeric films and other sheet materials by gravimetric method becomes mere child’s play.
- The new Automatic Gravimetric WVTR Tester GINTRONIC GraviTest 6250 comes with a 0.01mg balance as a standard feature. The 0.01 mg balance makes WVTR measurements of low perm materials 2-3 times faster than the previous generation systems.
- The same instrument like GINTRONIC GraviTest 6300/6400, but with 10 sample places with 30cm2 / 28,3cm2. Conforms to ASTM E96, JIS L1099 A1+A2 and many others.
- The same instrument like GINTRONIC GraviTest 6300/6400, but also for samples with a thickness up to 50mm.