Polyester is the fabric of choice for cleanroom garments because it sheds very little. It also charges easily. Charged garments attract particles and can damage sensitive electronics. Antistatic fabrics fix this.
How antistatic fabric works
Conductive fibres, usually carbon loaded, are woven into the polyester at regular intervals. When charge builds on the garment, it spreads along the conductive fibres and dissipates instead of accumulating.
Grid or stripe?
- Grid fabrics have conductive yarn in both directions, forming small squares (commonly 2.5 mm or 5 mm). Charge has more paths to travel, so grid fabrics generally perform more evenly.
- Stripe fabrics have conductive yarn in one direction only. They cost less and suit areas with lower static risk.
Surface or core conductive?
In surface conductive yarn the carbon sits on the outside of the fibre. In core conductive yarn the carbon is inside, protected by polyester. Core conductive fibres tend to keep their performance longer through laundering and are often used where garments cannot be reliably grounded.
Where static control matters
- Electronics and semiconductor assembly
- Areas handling flammable solvents or fine powders
- Any cleanroom where static is pulling particles onto garments and product
Relevant standards
Electrostatic properties of protective clothing are covered by the EN 1149 series, with EN 1149-5European standard for protective clothing with electrostatic properties, used where a spark could ignite a flammable atmosphere. The fabric must meet a surface resistance or charge decay requirement. setting performance requirements. Garments used as part of an ESDElectrostatic discharge: a sudden release of static electricity that can damage electronic parts or ignite flammable vapours. control programme for electronics are assessed under IECImporter Exporter Code: the 10-digit registration every Indian business needs to export goods. 61340-5-1. Ask for test data against the standard that applies to your site.
Looking after antistatic garments
Strong detergents, bleach and very high temperatures damage conductive fibres. Follow the care instructions, and include electrical testing in your garment life checks.
Our coveralls, hoods, booties and lab coats are available in antistatic carbon grid polyester. Ask for a sample.
Frequently asked questions
Do all cleanrooms need antistatic garments?
No. Static control is essential in electronics and where solvents or powders are handled. Many pharma cleanrooms use 100% polyester, though antistatic fabric also reduces particle attraction.