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BTC-2000
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BDC-2000
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BNC-2000
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BNC-1000
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BC-2000S
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KNC-2000
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KNB-2000
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BS-2000S
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BS-1000
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BS8-1000
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TBD-1000
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TA-2000
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Introduction
Virtually every article of clothing we wear is composed of spun fibers, such as cotton or wool. These fibers are twisted together (spun) to form yarns suitable for weaving. Unfortunately, such materials always create lint.
Because cleanrooms cannot tolerate self-linting materials, cleanroom apparel fabric must be made of syntheric, continuous filament fibers, which are inherently non-inting. However, fabric made of such multifilament yarns present several new problem:
Electrostatic interference
NASA's tests of synthetic fabrics without antistatic protection show that triboelectric voltages in excess of 20,000 volts are easily generated by rubbing synthetic materials togher. In everyday pratice, this is the same as simply rubbing your arm against your side. So you can have a static problem whether you know it or not.
The electrostatic field of the garment can destroy an electronic part either directly by a voltage surge, or by imparting a charge to microcontamination particles which are then electrostatically attracted to the part.
Worker discomfort
Syenthetic fabrics are ntorious for being hot and sweaty, especially if woven very tightly for maximum microcontamination control. The solution is for the weaver to employ very fine yarns-thinner than silk-to create a very dense. Fabrics can be woven so tightly that particles cannot easily penetrate, but moisture vapor can.
Environmental Degradation
Cleanroom garment are exposed to a wide range of hazardous conditions. Cleanroom fabric must resist chemicals, such as industrial-grade nitric and sulfuric acids. They must resist high heat sources and the infrequent flash fire.
The type of conductive yarn used to render the base fabric static-dissipative must be carefully selected. An impropely selected conductive yarn may be subjected to acid attack, to oxidation, or to embrittlement, all resulting in airborne contamination.
Every yarn in the fabric must be properly prepared for weaving to reduce particle counts during use and to avoid premature brealdown in the lundary process.
Lastly, if any surface chemical finishs are applied to improve filtration efficiently, splash resistance, or antimicrobial performance, they must be durable and non-erticulating.
E-mail
: bbschoi@cleandreams.com ..........Http://www.cleandreams.com
Phone : 82-2-2612-0970....... Fax : 82-2-2612-0971
805Ho 1 Dong Electronic Town, #75-1 Kochuckdong, Kurogu, Seoul, Korea
