Schildknecht Flexing Tester is used to determine the flexing resistance of rubber or plastic coated fabrics to flexural damage. It is applicable to the Method B of ISO 7854, BS 3424 and other standards.
A rectangular strip of coated fabric is fastened around two opposing cylinders so that the test piece takes a cylindrical form. One of the cylinders reciprocates along its axis, causing the coated-fabric cylinder to be alternately compressed and relaxed, thus resulting in folds in the test piece. This folding of the coated-fabric cylinder is continued until either a pre-set number of cycles is reached, or damage to the test piece is apparent.
Pairs of metal cylinders comprise the clamping and flexing devices. The test pieces are secured to the cylinders using the hose clips. The cylinders are 25.4 mm in outer diameter, and one cylinder of each pair is able to move up and down along its axis at the specified rate. The stroke length of the moving cylinder is 11.7 mm.