Jiangsu Textile Research Institute Inc.

With the continuous development of science and technology, more and more industries require the use of anti-static clothing. Anti-static clothing is widely used in chip, semiconductor, petrochemical, military, pharmaceutical and other industries. So how to judge the dust-free performance of anti-static clothing?

1. Use a microscope to observe whether the anti-static fiber added to the fabric will become a source of dust.

The production of anti-static clothing requires the use of conductive fibers. Incorrect conductive fibers may cause pollution. There are currently two common types of conductive fibers: surface carburized anti-static fibers and composite spinning anti-static fibers. Among them, surface carburized anti-static fiber is prone to peeling off due to washing and friction, which increases the amount of dust generated by the fabric, so it cannot be used in clean rooms.

2. Observe through a microscope whether the fabric uses filament fibers to weave natural fibers such as cotton and linen. 

It is easy to produce particles at the ends of the fibers, which are easy to absorb and generate dust. They cannot be used in clean rooms. Therefore, anti-static clothing is made of chemically synthesized filament fibers. In addition, it is necessary to observe whether the fiber contains impurities through a microscope. If there are too many impurities, it cannot be used in a clean room.

3. Check the accessories of clothing

Many auxiliary materials of anti-static clothing may cause pollution to the clean room, such as: sewing thread containing short fibers, wash labels, ear mesh, cuff ribs, foot ribs, dust-generating brushed hook and loop tapes, and coatings that may fall off. Zippers, clothing logos whose printing ink is easy to fall off, etc. For a qualified anti-static clothing, every accessory material should not be dust-prone.

4. Drum test

The drum test method is to tumble clothing or consumables in a stainless steel drum, and use an air particle counter to test the number of particles of various specified sizes per cubic foot. This method can more scientifically and clearly test whether the dust-free performance of anti-static clothing meets the requirements.