Stiffness Cantilever according to ASTM D1388
ASTM D1388
Principle
ASTM D1388 defines a method for determining the bending stiffness of fabrics using the cantilever test. The goal is to assess a fabric’s resistance to bending under its own weight, which reflects its drapeability, hand feel, and suitability for specific end-uses. The stiffness value helps distinguish between soft, flexible textiles and rigid, structured materials.
Testing Method
The cantilever test involves placing a fabric strip on a horizontal platform, allowing it to project over an edge. The strip is advanced until the overhanging portion bends under gravity to form a fixed angle (usually 41.5°). The length required to reach this angle is measured and used to calculate the bending length and flexural rigidity.
Key details:
- Performed under controlled temperature and humidity.
- Requires accurate sample preparation (specific width and conditioning).
- Calculations yield stiffness in terms of bending length (cm) and flexural rigidity (mg·cm).
- Both warp and weft directions are typically tested.
Applications
The method is used in:
- Textile product development (e.g. for apparel, upholstery, technical fabrics).
- Quality control in fabric finishing processes (e.g. stiffeners, softeners).
- Comparison of fabric types for flexibility and drape.
- Regulatory or specification testing for garments or industrial textiles.
- Research on material behaviour under bending stress.
Specific Testing Conditions
Specific conditions concerning our testing reports