Abstract:

Greater uncertainty may be produced in the measurement process of seam strength because of lots of affected factors. The main sources of uncertainty in GB/T 13772.1-2008 determination of the slippage resistance of yarns at a seam in woven fabrics-Part 1: Fixed seam opening method was discussed. And each component of uncertainty was estimated and composed. The combined and expended uncertainties were given. Analysis showed that: fabric samples should select from the middle of each batch and the width, uniformity and density should be same; A yarn along longitude or latitude should be marked before preparing samples, which is used to cut samples; Fabric should be conditioned completely according to different of fiber components; The stitches should be 50±2/100mm, which is guaranteed by a blank sample; The machine electrical sensor is 250N, rate of extension is (50±5)mm/min, the error of strength shall not exceed ±1%, the error of distance shall not exceed ±1mm. The expanded uncertainty of this sample is 4N.