THE STRENGTH OF THE COMPOSITE TEXTILES AT SEWING

The paper presents experimental researches on the stitching strength of some composite textile materials used at manufacturing protection footwear. The breaking strength and elongation at break has been observed at the SATRA tensile testing machine with 466 F attachment and digital software control. The maximum force at break of the stitch (N), the tensile strength at break (N/mm2), the breaking strength (N/mm), the elongation at break (%), Young s Modulus (N/mm2) are registered and the ready-to-load software provides a visualisation of the graphics as tests are undertaken. The stitching strength of composite textile materials is dependent on type and thickness of the assembled materials, the manner of sewing, the stitch density, the needle’s diameter, number of stitching rows, needle and thread fineness.