Multi – Criterion Assessment of Pneumatically Spliced Cotton Combed Ring – Spun Yarns

The results of examinations of the strength and geometric dimensions of pneumatically spliced cotton combed ring spun yarns are presented. Unknotted spliced joints were linked using a Jointair 4941 splicing device produced by Mesdan installed on an automatic winder made by the company Savio. The investigations were performed during the winding of the cotton combed yarns (linear density: 16 tex and 36 tex, i.e. fineandrelativelycoarseyarns, respectively) most often manufactured in the textile industry. For the multi – criterion estimation of pneumatically spliced joints, the Integral Index of Quality – QZ was introduced, based on the considerations of Żyliński, which is connected with the General Index of Quality. The total plan of the experiment was carried out, comprising the simultaneous influenceoftwosettingsofthesplicingdevice:tE – time of preparing the yarn ends and tA – time of splicing the yarn ends. In the examinations, the most beneficialsettingsofthesplicing device were established subsequently for the particular features tested. Therefore, sets of recommended settings for the splicing device were obtained. Only one of the useful sets of settings in the technology permits the creation of unknotted pneumatically spliced yarn joints with features fulfilling many criteria.