There are several types of pilling apparatus.
1. Martindale wear-resisting instrument:
Under the pressure, the round sample on the sample clamp and the abrasive on the table (the same fabric or wool fabric as the tested sample) will be rubbed according to the li sha ru curve. The sample can rotate freely around the center axis perpendicular to the sample plane. After the specified friction stage, the starting and pilling grades of the samples are evaluated by visual description.
2. ICI rolling box and hook wire tester:
The sample installed on the polyurethane tube is flipped in a wooden case with a constant speed and a cork. After the specified number of flips, the performance of pilling was evaluated by visual description.
3. Tumbling ball tester:
The sample was put into the test box. Under the rotation of the impeller, the cork lining of the box was randomly and randomly. After the setting time, the sample was taken out for rating.
4. Circular track lifting ball instrument:
According to the prescribed method and test parameters, nylon brush and fabric abrasives are used or only fabric abrasive is used to make the sample friction and pilling. Then, the performance of pilling was evaluated by means of illumination.
