Vapour permeability testing

Vapour permeability is measured using the Mocon and Lyssy methods

Method	Diagram
Mocon – vapour permeability measurement Dynamic test Measurement in accordance with ASTM 6701-01 Measurement at a constant 37.8 °C temperature Percentage change of moisture content of the measured sample compared to the standard value The device measures vapour permeability (g/m2 x 24 h).
Lyssy – vapour permeability measurement Static test Measurement in accordance with ISO 15106-1 Measurement at a constant 38 °C temperature The device records the time necessary to increase the moisture content from 9.9 % to 10.1 %. The device measures vapour permeability (g/m2 x 24 h) based on previous calibration.

 

TESTS

The products are subjected to tests of the following properties:

• Dimensions
  • Role width and diameter are measured in accordance with PN 4524/96 (manufacturer’s internal standard).
• Tensile strength at break, elongation at break, stress at elongation
  • In accordance with ČSN EN ISO 527-1 and ČSN EN ISO 527-3; tensile testing machine jaw travel speed: 100 mm.min-1, test specimen: type 2.
  • In accordance with ASTM D 882.
• Basis weight
  • In accordance with ČSN EN ISO 2286-2. or In accordance ASTM E 252.
• Vapour permeability
  • In accordance with ČSN EN ISO 15106-1, LYSSY apparatus.
  • In accordance with WSP 70.6 part 2, LYSSY apparatus .
  • In accordance with WSP 70.4, Mocon apparatus .
• Resistance to water column
  • In accordance with ČSN EN 20811.
• Dimensional fastnes
  • In accordance with ČSN EN ISO 11501, 60 °C/1 h., test specimen: 100 x 100 mm.
• Friction coefficient – KKT (NW/metal)
  • In accordance with ČSN EN ISO 8295.
• Ionisation level
  • In accordance with PN 4525/95 (manufacturer’s internal standard).
• Peel effect (lamination fastness)
  • In accordance with WSP 401.0 (05).