The test is also made on DTY machine, by stopping the second heater and varying process velocity, draw textured temperature, ceramic false twister friction factor, feed angle, the high quality 28 dtex/24 f superfine PET stretch yarn is produced in replacement of PA6 or PA66 stertch yarn.
Based upon the principle of mechanical resonence of a string, we have designed and produced a photoelectric detector for micro-vibration signal, by means of which it is possible to measure accurately the speed of rotation up to 800,000 rpm of a filament 0.1mm in diameter, thereby answering the purpose of active detection of the twist of textured yarn.
It analysies the factors that influence evenness dyening of nylon textured yarn from raw material,technology,equipment and operation,High evenness dyening is the foundation of raisisg produs quality.
The process condition of 27dtex/7f polyamide 6 POY and 22dtex/7f polyamide 6 DTY on the product quality are discussed. In condition of process speed:700m/min; drawing ratio:1.235~1.245;
It is also observed that under the same twist level, the wicking height of the five-leaf low-stretch yarn is the largest among all those three kinds of yarns, and then is that of the conventional low-stretch yarn.