This standard specifies the methods for measuring the water vapor transmission capacity, water vapor transmission rate, water vapor transmission coefficient and water vapor diffusion resistance index of rigid foam plastics. This standard applies to rigid foam plastics with a thickness of 10 mm or more. It can be a complete material or a foam material with a white crust or adhered surface material. This standard specifies three different temperature and humidity conditions: a) 38℃, humidity gradient is 0% ~ 88%; b) 23℃, humidity gradient is 0% ~ 85%; c) 23℃, humidity gradient is 0% ~50%. The results obtained by this method can be used for product design, production control and product specification. This method is suitable for materials with water vapor permeability in the range of 3 mg/(m'·s) to 200 mg/(m2·s).
ISO 1663:1999 history
2023ISO 1663:2023 Rigid cellular plastics — Determination of water vapour transmission properties
2007ISO 1663:2007 Rigid cellular plastics - Determination of water vapour transmission properties
1999ISO 1663:1999 Rigid cellular plastics - Determination of water vapour transmission properties
1981ISO 1663:1981 Cellular plastics; Determination of water vapour transmission rate of rigid materials