INSTRON CLOTH LOAD TESTER

Instron Load Test

Prior to receiving the upwind cloth that we have ordered, we receive a sample for our testing program. To pass our acceptance standards, each cloth sample is cut into eight individual strips. Four strips are cut at 0, 10, 30 and 45 degrees off the primary threadline and each strip is tested on the Instrom. The graphs of load versus elongation at drawn by the Instron machine, and data from these graphs are entered into our cloth database. Four more strips at the same angles are cut and placed on our IMPACT FLUTTER TESTOR, and spun at high speed into the edge of the test bed. After this severe and destructive Impact Flutter test, these samples are tested on the Instron, and a second set of graphs are drawn. The data from this Impact test are also entered into our database. The data base program compares this data to prior tests of the same type of cloth and accepts or rejects the sample. On the average, our test program rejects from 30% to 70% of the upwind fabrics we purchase. This testing program is unique to Haarstick Sailmakers, and is not duplicated by the cloth manufacturers. (to learn more go to: HTML)