How long does the anti-static suit need to be replaced?
According to different use environments and usage habits, it should be replaced if it is washed about 100 times according to the normal operation. The Hanmerk roller test evaluation is commonly used.
The cleanliness standard of the first-grade work clothes is that the cleanliness standard of the first-grade work clothes is that the number of particles with a particle diameter of 0.5 μm or more per cubic foot of air in one minute should be no more than 1200.
1) ASTM F-51 Preparation: Standard Test Method for Quantification and Statistics of Particle Contaminants on Cleanrooms. Evaluate particle shedding and number of filaments above 0.5 um on a square foot of fabric. SEM/EDX or SEM/EDS can identify particles on the filter as soluble particles, insoluble particles or ionic particles. The standard for Class A garments is less than 1000 particles with a particle size ≥ 5um per square foot of cloth. Less than 10 filaments. The human body box or particle control test evaluated a complete clean room garment system in a simulated clean room environment.
2) EOS/ESDSTD 2.1.: Standard Test Method for Protection of ESD Sensitive Items - Work Clothing, or ASTM D-257, Standard Test Method for DC Impedance or Conductance of Insulating Materials, Evaluation of Clean Clothing Fabrics Surface resistivity and surface resistance. The static dissipative range of clean room garments is 105-11 Ω. The microbial penetration test evaluates the ability to produce microbial particles. Moreover, there are other well-established support tests to determine. Identification of particles generated from tests such as SEM/EDX or SEM/EDS. The same test method used to evaluate dust-free fabrics can also be used to determine if a dust-free garment should be replaced or when it should be replaced. If you are wearing anti-static clothing If there are higher requirements, the test will be selected in batches and will be changed if the standard is not reached. This will not be entangled in the question of how long it takes to replace the anti-static clothing.
