ASTM F1249
Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor
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About This Item
ASTM F1249 is the ASTM standard for measuring water vapor transmission rate through plastic film and sheeting using a modulated infrared sensor. It provides a recognized method for evaluating how much moisture passes through barrier materials, which is important for product performance, packaging design, and material selection. By using a consistent test approach, this standard helps manufacturers and buyers compare results more reliably and support quality-focused decisions.
What is ASTM F1249?
ASTM F1249, Standard Test Method for Water Vapor Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor, describes a test method for determining how plastic films and sheets resist water vapor transmission. The standard is commonly used as a technical reference when moisture barrier performance needs to be measured in a repeatable way. Its sensor-based approach supports consistent evaluation of thin materials where water vapor control can affect usability, shelf life, or protection.
Where is ASTM F1249 used?
This standard is commonly used in testing environments that evaluate plastic film and sheeting for moisture barrier performance. It is relevant in quality control, incoming material verification, and product development workflows where film-based materials must be compared against performance targets. ASTM F1249 may also be used by packaging, converting, and materials labs that need a reliable method for assessing how well a film or sheet limits water vapor transfer under defined conditions.
Why is ASTM F1249 important?
The standard matters because water vapor transmission can strongly affect material performance and end-use suitability. ASTM F1249 helps create consistency in testing so results can be used for compliance checks, procurement decisions, and product comparisons. For teams working with plastic film and sheeting, it supports better control over barrier properties, reduces uncertainty in specifications, and provides a common technical basis for evaluating moisture-related performance risk.
- Water vapor transmission rate testing
- Plastic film and sheeting evaluation
- Modulated infrared sensor method
- Quality control and material comparison
- Barrier performance verification
- Publication Date: 2020-08-04
- Publisher: ASTM
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