How can I tell if the dust-free wipe is dust-free
Generally, clean wipes are defined by the following methods:
1. The amount of dust generated by the dust-free wipes is divided into two types. One is the amount of dust particles released in the air (APC). Perhaps you think that since the dust-free wipes are dust-free, they should not drop dust when shaking. . In fact, all fiber woven fabrics will drop chips when shaking, but the amount is different. At present, it is mainly realized by Hank rollers. The other is to detect the release of dust particles (LPC) in the liquid, which is to soak the dust-free wipes in a certain amount of deionized water, and after ultrasonic vibration, detect the concentration of dust particles in the deionized water.
2. The amount of ions released by the dust-free cloth is mainly tested after immersing in deionized water, which can detect metal ions and non-metal ions with high activity. For precision metal materials, highly active ions can easily damage the surface through chemical reactions. Ion precipitation is undoubtedly an important inspection item.
3. The amount of non-volatile residues of the dust-free wipes in the solvent. To put it bluntly, it is the test of residues after use, mainly for non-volatile substances. The test is the composition of the clean cloth fabric. What solvent is usually used as the basis for evaluation. In addition, the user can also determine whether the residue of the dust-free wiping cloth is within the required range by using whether it is fogged during wiping, but it is necessary to pay attention to the influence of the light, and excessive light will affect the judgment. Usually, the same batch of dust-free wipes will be tested before and after packaging, and random inspections are performed before shipment.