Standardized testing procedures begin with proper sample preparation. Samples must be conditioned under standard temperature and humidity conditions and protected from contamination. Prior to formal testing, all relevant instruments must be calibrated according to established protocols to ensure measurement traceability. Taking filtration efficiency testing as an example, the process involves securing the sample in a test fixture, using an aerosol generator to produce standard particles with a specified size distribution upstream, simultaneously measuring upstream and downstream particle concentrations with particle counters, and calculating the filtration efficiency. For particle shedding tests, a tester wearing the cleanroom suit performs specified movements within a clean testing chamber while a particle counter quantifies the total number of particles released by the garment. Environmental parameters, instrument settings, and raw data must be meticulously recorded at each step to ensure process traceability.
Antistatic Performance Testing
In accordance with the GB 12014 standard, a point-to-point resistance tester is used. Five test points are selected across the garment fabric, a test voltage of 100V is applied, and the stabilized resistance value is recorded; the acceptable range is 1.0×10⁵ to 1.0×10¹¹ Ω.
Cleanliness (Particle Generation) Testing
A dry particle generation test method is employed. The cleanroom suit is placed inside a sealed particle generation test chamber, where the fabric is agitated to simulate human body movements. A particle counter tallies the number of particles larger than 0.3 μm within the chamber to determine compliance with the low particle generation requirements for the specific cleanliness class.
