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ChemStat 909 Plus Series
Static Dissipative Fabrics and Automotive Spray Booth Fabrics

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The ChemStat 909 Plus Series of fabrics are the premier fabrics for antistatic cleanroom garments and are the result of years of research, requested by NASA for the Space Shuttle program. ChemStat 909 Plus and ChemStat 909A Plus from the series.

ChemStat 909 Plus is used in Class 100 cleanrooms, and is NASA-approved for use for non-explosive environments. It is the primary antistatic garment material used in most automotive spray booths.

ChemStat 909A Plus is finished slightly denser for use in Class 1 and Class 10 cleanrooms, primarily semiconductor and related facilities. It is used in cleanrooms using ballroom designs, mini-environments, and smyf pods.

Both fabrics are composed of 21,000 fiber filaments per square inch, for 25% greater filtration effectiveness than with alternative materials found elsewhere.

Both employ a patented* grid of conductive carbon polyester yarns. The grid rises slightly above the plane of the fabric, acting as a “wick” to draw static electricity out of the fabric and then to dissipate it innocuously into the surrounding, humidified air.

The performance of this enhanced feature allows for a more spacious grid requiring 25% less carbon in the overall fabric than is needed in alternative materials. The ChemStat conductive yarn is an extruded copolymer of polyester and carbon that is impervious to industrial launderings, usually in excess of 150 times. The base fabric is composed of 100% industrial tenacity polyester fibers exhibiting:

• High chemical resistance
• Rugged durability
• Compatibility with any standard cleaning system (DI water, dry cleaning)
• Universal sterilization protection (steam autoclave, ETO, gamma radiation)
• Limited flame retardance (also see ChemStat 919)

The 2/1 twill weave used in the design of the Chemstat 909 Plus Series is similar in appearance to a plain (taffeta) weave, but it allows for greater filament density and a softer, less scratchy texture. The 2/1-twill weave of the ChemStat 909 Plus Series provides over 3 times the strength of plain weave fabrics for unmatched durability.

Despite their tightness, both materials are also the coolest and lightest cleanroom fabrics available, owing to their silk-like design. Specifically, the technology used to achieve such cooling rates in the base fabric derives from a process developed by Stern+Stern for fabrics used in the curing of the booster rockets for NASA’s Space Shuttles.

Derived from a methodical French silk process, the ChemStat dyeing process uses no chemical additives that would otherwise cause micro-contamination or a degradation in yarn strength. This more thorough dyeing process results in a much higher quality fabric with a softer texture, greater durability, and greater depth of color.

Both ChemStat 909 Plus and ChemStat 909A Plus are readily available in 9 attractive colors. In addition, the upgrade to the ChemStat 909 Plus Series offers an optional Teflon® Z Plus flourochemical finish for enhanced paint spray resistance, similar to that offered with ChemStat 949 Plus.

Once you have tried ChemStat 909 Plus or ChemStat 909A Plus, it is easy to appreciate why their design is the standard against which all other competing fabrics are measured.

Warning: At its melting point, 480°F (250°C), polyester can cause melt burns even in the absence of flame. If high heat or explosive situations may occur, ChemStat 919 should be used instead.

*US patent #4,557,968
Teflon is a DuPont registered trademark for its fabric protector.

Technical Data

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