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We need to use the crepe length gauge and the balance when measuring the density of the polyester thread. Let's take a look at the specific steps:
1. First check the stop and mechanical status of the length measuring instrument.
2. Set the number to the set number of turns on the length meter counter.
3. Pull the sample out of the wire and pull it through the tension device and the wire transfer device, then pull it off 1-2m, and then fix it on the clip on the yarn frame of the length gauge.
4. Turn on the power and press the “Start†button. The yarn frame is rotated to the number of turns indicated by the counter pre-selection, and the yarn frame is stopped.
5. Cut off the head and tail of the sample, remove the individual wires on the wire frame and make a small knot, and weigh on the balance.
6. Calculation of the result, density (dtex) = G × 10000 / L, the weight of the G-filament in the formula (g), and the length of the L-filament (m).
The above points are the methods and steps for measuring the density of polyester threads. I hope that everyone can help when testing their quality.
How to detect the density of polyester threads
The density of the polyester yarn indicates the thickness of the fiber, which is one of the important quality inspection indexes of the fiber. We generally use this method to detect its quality.