China is currently in the dust free clean clothes clean function test did not have a national standard, can refer to the Japanese air clean Association Special Committee of the Japanese industrial standard JIS-B-9923, and the United States IES specification RP-CC-003-87-T. On the evaluation of the dust free function, each profession can make use of the clean workshop standard according to the international standard ISO/TC209, and contact the respective grade of the clean.
1, clean clothes clean
Clean clothes is applicable to electronics, optical instruments, pharmaceutical, microbial engineering, precision instruments, such as career with dust-free, anti-static function special clothing factory, the cloth is usually embedded in the fabric of the conductive filament synthetic fabrics. Clean clothes for the most important part is to be clean, although the fiber itself is very difficult to dirty clean fiber, but how to adhere to an important element, that is, with a clean approach. If the use of the general method of washing, of course, will also be dirty. So you have to use a special way. Clean clothes, consider from management, clean in time must also be in clean room clean Jie packaging, the degree of cleanliness have high demand of the dust-free workshop, using vacuum packaging. Usually clean clothes at least once a week to wash, some of the high demand for jobs and even a day wash.
100 grade clean company workshop
In the clean room cleaning process should pay attention to the following matters:
(1) the newly made clean clothes can be directly carried out, while the recovery of the clean clothes through the discovery of oil, should be careful to remove the oil and then wash.
(2) to check for damage and scrape, hasp and other accessories to wash, to repair the defect, replace or void.
(3) must be clean, dry, in use than clothing factory and dust-free workshop clean and dust-free workshop in a high degree of packing.
(4) wet, dry clean water to be filtered, the solvent is also to be distilled after the use of less than 0.2 M pore size of the filter membrane, according to the need for more than one filter.
(5) in order to remove the water soluble pollutants, wash with clean water, and then the distillation of the solvent to carry out the final wash, remove oil pollutants.
(6) the wet wash water temperature is as follows: polyester cloth 60-70C (highest 70C) nylon cloth 50-55C (maximum 60C)
(7) in the final rinse water, it can be used to improve the antistatic property, but the choice of antistatic agent should be in good contact with the fiber, no dust fall.
(8) a hasp clothing factory, should wash in the buckling state.
(9) the dry air circulation system is used in the washing and cleaning air.
After a boring, while washing and dust-free workshop folded, into the clean polyester bag or nylon bag, according to the demand can be double packaging, vacuum packaging, packaging material is best to use antistatic outstanding data. Because the folding process is the most prone to dust, the folding process must be carried out in a high level of space, such as the folding of the 100 level of clean clothes should be carried out in the 10 level environment.
2, clean clothes function check
2.1, purification function check
Attached to the use of clean room clean clothes cloth inside and outside pollution particles measured in the following four ways: ASTM F-51 method (microscopy) and F-51 cultivation method (counting), HELMKE turn cylinder method drum method, equivalent to ASTM Test Method) and oscillation experiment method (oscillation).
(1) the ASTM-F-51 method (microscope) test probe is equipped with a filter barrier, directly connected to the air suction metering pump, the air volume is 28L/min. Test the air through the cloth, in the air containing dust particle capture to the membrane, with a 400 fold microscope investigation and calculation the number of dust particles. Read the 0.5-5 above the membrane and the number of particles above 5. In the filter membrane, the 3.08mm is printed on the grid, which can be read from a number of particles within a grid.
(2) ASTM-F-51 Amendment Act (counting) the air after experimental material, using particle counter determination of dust particle size and number. The sample is placed on a metal mesh belt frame, the sampler (with filter support 47mm alternative) touch attraction, after the amount of air 28L / min, respectively.
(3) roll barrel method (Helmke drum test the specimen into a flank openings of the rotation of the rolling barrel rotation, from within a grain bucket of dust particle sampling, determination of particles with a particle counter number resolution cleanliness grade. The rotary drum size is 43cm * 33cm, there are 4 leaves in the barrel inside the barrel, the speed was 10 rpm.
(4) the sample is placed in a small chamber, and the sample is measured by a particle counter. Together, the particle size of the particle (more than 25) is captured on the filter membrane, and the number of particles is read. The air flow rate is 3.5 feet per minute (0.099m/mim), the oscillation frequency is 150 times.
