Analysis of the factors influencing the results of the textile pilling test

Fabric random pilling test is a test experiment often performed by many textile companies. Due to the influence of various factors such as friction during the use of textiles, the phenomenon of wear, pilling and other phenomena occur; according to different The standard uses different testers, this article will focus on the analysis of factors influencing the results of the fabric random pilling test.

1. Test Principle:
According to the test standard, the sample in the cylindrical test box is driven by the airflow of the rotating blade Then rub against the cork pad installed on the inner wall of the test chamber. The air pressure present in the test chamber ensures uniform friction of the sample. After a certain amount of time, the surface of the test sample will begin to pill. After the test, the samples are taken out and assessed in the assessment box.

2. Reasonsaffecting the test results:
(1) Air pressure in the test chamber:
According to the test principle, the air pressure in the chamber and the rotation of the rotating blade directly affect the air pressure in the chamber Friction of test specimen against cork support. According to relevant standards, the air compression device is required to make the air reach 14-21KPa in each test chamber. At the same time, the airtightness of the test chamber should be ensured, and the door should be closed tightly during the test.
(2) Sampling method:
According to the standard, it must be ensured that the three samples come from the same test sample and do not contain the same warp and weft yarns. The size of the sample is (105 ± 2) mm * (105 ± 2) mm, mark the sample, seal the edge of the sample with an adhesive, hang it to dry, and the drying time is not less than 2 hours.
(3) Use of test equipment and auxiliary materials:
Cylindrical cork liner: length 452 mm, width 146 mm,thickness 1.5mm. The cork pad should be replaced after 1 hour of use and the unused side should be rubbed against the sample.
Place the short gray cotton and the sample in the test chamber (weight 25 mg, length 6 mm) to improve the friction and lint performance of the sample so that the hairballs are visible.
(4) Assessment box and assessment method:
Because the assessment of the random pilling test is subjective, it contains certain errors.
First understand the installation, light source and observation method of the sample in the evaluation box according to the standard. Arrange the tested sample and an untested sample (or pilling standard photo) side by side in the center of the sample plate in the evaluation box along the length of the fabric. Use white fluorescent tubes or lamps for illumination, keep the light source position at 5°-15° from the sample plane, and keep the observation direction at 90°±10° from the sample plane. The distance between the eye with nortimes corrected vision and the sample should be 30 cm - 50 cm.
The rating is subjective and it is recommended that at least 2 people give a rating. Record the grade of each sample, and the rating result of a single person is the average value of grades for all samples. The test result of the sample is the average value of all staff\'s ratings. If the average value is not a whole number, it should be corrected to the nearest 0.5 level and expressed by \"-\", such as 3-4 . If the difference between a single test result and the mean value exceeds half a digit, the grade of each sample must be reported at the same time.
(5) Cleaning of the test chamber:
every timeBefore the test, check whether the test chamber is clean and clean it with a vacuum cleaner.

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