This is to ensure that only HEPA or ULPA filtered air is used to prevent contamination of textiles. Usually, H13 come filter to use. ISO 14644 guarantee the air quality of the ISO5 according to DIN. Sterilization according to the place of use of the clothing and the applicable limits, a sterilization of the clothing is recommended after the decontamination process. Common sterilization methods of textiles: sterilization: irradiation of recycled textiles and killing the microorganisms steam sterilization/autoclaving: steam transfers its heat energy to the sterile and thereby kills micro-organisms, if saturated strained steam at sufficient temperature and exposure time affects the sterile (121 C or 134 C and 20 minutes and 5 minutes) the preparation of textiles for sterilization (disinfectant washing, drying, Textile testing, etc.) have quality to be carried out in a clean room appropriate. Residual substances in clean room garments are an enormous danger potential depending on the application area. Basically, residual substances are the result of insufficient rinsing process, a logistical negligence or faulty Media Guide.
The consequences range from production to personal injury. To be able to assess quality control to the successful decontamination of clothing, a piece of reference sampling is useful. To the Basically two methods on the market have established themselves determining the residual particles: Helmke drum test (IEST-RP-CC-003.2): the test simulates the particle distribution of clothing for movement. The clean room apparel to be tested is placed in a rotating drum of stainless steel, to resolve particles from the surface of the clean room apparel in a controlled way. The air in the drum is extracted. During the first ten minutes, the average concentration of particles in the air inside the drum is determined by means of an automatic particle counter. Determination of residual contamination is possible also by air-impermeable materials. Classification of test results in the Helmke drum test (clothing), the result is specified in 3 categories.