Water vapour transmission rate (WVTR) plastic films, laminates, coated papers and aluminium foils

Measurement is performed using the water vapor specific method (hydrolysis sensor or infrared sensor). Usually deviating from the standard as a double determination.

In short — AI-generated

This test determines the water vapour transmission rate (WVTR) of flexible packaging materials like plastic films, laminates, and aluminium foils. The material is clamped into a test cell, and the amount of water vapour passing through the sample is measured over time using either an infrared or an electrolytic sensor.

The resulting value indicates the barrier performance of the packaging material against moisture. Packaging developers use this data to ensure that the chosen material provides sufficient protection to maintain the shelf life and quality of moisture-sensitive products.

Text is AI-generated; based on test method data curated and verified by Innoform.

Test Method Group: permeation

Norms:

DIN EN ISO 15106-2 (2005-5) Plastics; Film and sheeting - Determination of water vapour transmission rate - Part 2: Infrared detection sensor method
DIN EN ISO 15106-3 (2005-05) Plastics – Film and sheeting Determination of water vapour transmission rate – Part 3: Electrolytic detection sensor method
ASTM F 1249 (2025) Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor
ASTM F 3299 (2023) Water Vapor Transmission Rate Through Plastic Film and Sheeting Using an Electrolytic Detection Sensor (Coulometric P2O5 Sensor)

Required Sample Amount: optimum: 2 DIN A 4 sheets without folds, creases or other damages