How is the cleaning cycle of dust-free esd clothing specified?
Many dust-free workshops require the use of dust-free clothing, but how often should the dust-free clothing be washed? How is the cleaning cycle determined? Many users wait until their eyes can see it is very dirty before calling a cleaning company. Little do they know that this will cause damage to the dust-free clothes.
In fact, the cleaning of dust-free clothing depends on the frequency of use and cannot be generalized. If you are in the electronics and microelectronics industry, the anti-static performance requirements of dust-free clothing are particularly strict and need to be cleaned frequently.
Some dust-free factories make replacements based on the appearance evaluation standards or cleaning times of dust-free clothing. Most dust-free clothing cleaning companies have certified that their work clothes can generally be cleaned 100 times. So, what criteria should be used to judge the replacement time of clean clothes? The percentage change based on the original test data can be used as an objective standard to judge the replacement of dust-free esd clothing.
After using it for a period of time, it must be professionally tested with an instrument to see if its antistatic performance parameters are still within the standard range. The antistatic performance can be tested through the following methods:
1. Charge surface density method
Test after rubbing with nylon standard cloth in a specific way under specified conditions. The smaller the charge surface density, the better the antistatic performance.
2. Frictional charging voltage method
The testing principle of this method is to rub the sample and the standard cloth against each other under certain tension conditions, and use the highest voltage and average voltage generated at this time to evaluate the frictional charging relationship between the wearer and the outerwear. The method is to use a dust-free clothing fabric sample to clamp the sample clamp on the drum. The drum rubs against the standard cloth (nylon or polypropylene) at a rotation speed of 400 rpm, and the maximum charged voltage of the sample within 1 minute is tested.