Background Info & Warranty

Background Info & Warranty
Background Info & Warranty
Background Info & Warranty
Background Info & Warranty
previous arrowprevious arrow
previous arrowprevious arrow
next arrownext arrow
next arrownext arrow

Virtually every article of clothing is composed of spun fibers, such as cotton or wool. Unfortunately, such materials always create lint. Because cleanroom protocol prohibits self-linting materials, cleanroom apparel must be made of synthetic, continuous filament fibers, which are inherently non-linting. However, fabrics made of such filament yarns present several problems, listed below.

Electrostatic icon

Electrostatic Interference

When rubbed together, synthetic fabrics without antistatic protection generate triboelectric voltages in excess of 20,000 volts. In everyday practice, this is the same as simply rubbing your arm against your side. The electrostatic field of the garment produced thereby can destroy an electronic part either directly by a voltage surge, or by imparting a charge to micro-contamination particles that are then electrostatically attracted to the part. Worse, arc flashes from electrical equipment can cause serious physical harm to workers not appropriately protected.

Antistatic finishes or topical treatments are ineffective, short-lived, and visually undetectable. The optimal solution is a raised 1/4" grid of non-degradable carbon yarns woven into the base fabric that can easily be seen by QA personnel.

heating icon

Worker Discomfort

Synthetic fabrics are notorious for being hot and sweaty, especially if woven very tightly for maximum micro contamination control. The solution is for the weaver to employ very fine yarns – thinner than silk – to create a very dense, yet very sheer material. Fabrics can be woven so tightly that particles cannot easily penetrate, but moisture vapor can.

Permeability icon

Environment Degradation

Cleanroom garments are exposed to a wide range of environmental conditions. Cleanroom fabrics can be designed to resist spilled chemicals, such as industrial-grade nitric and sulfuric acids. They may also be designed and chosen to resist high heat sources, the infrequent flash fire, and arc flashes.

In designing cleanroom fabrics, the types of conductive and base yarns, the weave construction, and the finishing methods all must be balanced carefully to address various chemical and electrical cleanroom conditions. If any surface chemical finishes are applied to improve filtration efficiency, splash resistance, or anti-microbial performance, they must be durable and non-particulating.

warranty icon

Limited Product Warranty

STERN EWS Industries warrants the manufacture of its Electrostatic icon materials against premature wear during normal use and laundering. If during the first year of use, any Electrostatic icon portion of a properly designed, properly constructed, and properly laundered cleanroom garment with date code of manufacturer attached thereto exhibits abnormal wear under routine cleanroom conditions. STERN EWS Industries will replace the affected ChemStat material free of charge, but is not liable for the cost of processing, lost profits, injury to good will, or any other special or consequential damages.

No representation or warranty (either express or implied) of merchantability, fitness for a particular purpose or of any other nature are made with respect to the information presented in this website or to any product referred to herein. The determination of the suitability for use, chemical compatibility, and durability of a ChemStat material in a particular cleanroom environment is the responsibility of the end-user operating the cleanroom and the end-user's chosen laundry service provider. Such determination must be established and documented prior to material selection by both the end-user and its laundry service provider, otherwise, this limited product warranty is voided.

ChemStat™ Antistatic Fabrics

  • Background Info and Warranty


  • ChemStat™ 919

    Flame resistance
    Arc flash protection
    NASA-approved for Cape Canaveral cleanroom and refueling use


  • ChemStat™ 929

    See-thru facemask material


  • ChemStat™ 939

    Rubber Bootie Soles





Since 1889 STERN EWS has produced specialty industrial fabrics.  



ISO 9001-2015 certified production to deliver consistent product every day. 



As a single-source provider for many of our clients, STERN EWS supports them by meeting expectations with consistency. 


Didn't find what you're looking for?

We can customize your fabric.