Test operation of non-woven fabric water absorption performance tester

The non-woven fabric water absorption tester is used to test the liquid absorption of non-woven/non-woven fabric materials under constant pressure to compare their water absorption performance, but not to simulate the actual use conditions of the finished product.

Test principle:
The sample is placed on the perforated plate, the porous plate passes through the siphon tube, and the liquid level in the reservoir becomes low. surface of the perforated plate, the absorbency of the fabric under pressure was obtained by measuring the mass of the reservoir as a function of time.

Test standard:
Standards in GB/T 24218.12-2012, determination of water absorption under pressure of nonwovens

Related Terms:
zu maximum absorbed mass (Af):
The mass of liquid absorbed by the sample until Tf time, unit is grams. The changeof the mass of liquid absorbed by the sample at Tf to the mass of liquid absorbed 5 s before Tf is less than 1% of the mass of the absorbed liquid at Tf.
Absorbency under pressure (DAC):
The ratio of the maximum absorbed mass Af to the sample mass m, the unit is grams per second.
Maximum Absorption Rate (MAR):
The maximum change in the absorbed liquid mass within a unit of time, in grams per second.

Test steps:
1. Use hydrophobic double-sided tape to stick the hydrophobic foam pad to the weight so that the foam pad can be replaced at any time.
2. Prepare 5 pieces of samples with a diameter of (55±1) mm, cut from the same sample (preliminary humidity conditioning treatment is required).
3. Add water to the reservoir so that the surface of the water does not go over the bottom of the glass tube; add water fromoff one end of the funnel to fill the tube with water, then block one end of the glass tube with one hand, and at the same time pour the other hand into the funnel Add water to make the water surface even with the surface of the funnel, then cover the porous glass plate to the top of the funnel, then wipe the surface of the porous glass plate with a dry clean cloth, then put the test sample on the porous glass plate and cover with a cylindrical weight; Adjust the outer surface of the upper end of the horizontal part of the U-shaped tube (40 ± 0.5 ) mm higher than the liquid level in the reservoir.
4. Turn on
5. Select the language and enter the testing interface
6. Enter the sample number, enter the quality of the tested sample, select the standard absorbance rate (or high absorbance percentage) and click the Test button.
7. Click the start button to start the test
8. After the test, click the Save button
9. Click the data button on the left side of the screen to view the saved data
10. Calibration
If the test is frequent, it should be calibrated every two days. The calibration includes the calibration of the multi-well plate flow rate and the calibration of the electronic balance.board calibration.
11. Measuring method:
Use a needle to extract 11ml of deionized water, install the plastic fixture on top of the funnel, then pour 11ml of deionized water into the fixture, and check whether the flow rate of the porous plate on the page is at 2.5~ 3.5g/s interval.
12. Electronic balance calibration
Click the calibration button on the left side of the screen, select electronic balance calibration and follow the instructions on the interface to operate.

was founded in 2003. Since its establishment, itis committed to the promotion of testing standards and is committed to textile material testing The overall solution for the laboratory, providing testing equipment for quality control institutions, enterprises and scientific research units, excellent after-sales service, prompt service, so that customers do not worry need to worry. The company adheres to the service concept of professionalism, sincerity, enthusiasm and comprehensive proximity to customer needs, which is highly recognized by customers.

Prev: The role of UV aging test chambers in the printing industry