What is BS 3424-34 – Water vapour permeability index about?
BS 3424-34 is an international standard that focuses on methods of testing coated fabrics to ensure their high quality.
BS 3424-34 describes a method for determining the water vapour permeability of a coated fabric relative to that of a standard woven polyester monofilament fabric.
Who is BS 3424-34 – Water vapour permeability index for?
BS 3424-34 on methods of testing coated fabrics with the determination of water vapour permeability index (WVPI) is useful for:
- Manufacturers of coated fabrics
- Product development entities
- Quality control entities
- Textile manufacturer
- Clothing industries
Why should you use BS 3424-34 – Water vapour permeability index?
The transmission of water vapour through textiles and polymer-coated textiles is a feature of great significance to many ends uses, in addition to apparel, such as tentage and certain types of decorative awnings for example.
BS 3424-34 provides you guidance on principle, apparatus, sampling, procedure, measurement, expression of results, precision and test report which enables you to determine water vapour permeability index (WVPI) and ensures the quality of testing coated fabrics.
BS 3424-34 compares the rate of water vapour transmission through the coated fabric under test with the rate of transmission through a standard woven polyester reference fabric under the same circumstances, thus allowing comparisons to be made between different materials.