International Standards for Anti-Static Coveralls

International standards for anti-static coveralls are established to ensure electrostatic safety, garment practicality, and industry applicability. They cover core aspects such as fabric performance, garment design, and testing methods, serving as a vital basis for global enterprises to ensure compliant production and workplace safety. These standards are suitable for various electrostatic-sensitive environments, including electronics, chemicals, and pharmaceuticals. The following outlines the mainstream core international standards, clarifying the scope of application and key requirements for each, while taking into account the comprehensive protective features of coverall designs.

I. EU Standard System (EN Series): Core Mandatory Compliance Standards for the EU Region

Anti-static coveralls in the EU must comply with CE certification requirements, primarily adhering to the EN 1149 series of standards. These fall under the EU’s Category II Personal Protective Equipment (PPE) regulations and are widely used in flammable and explosive environments such as the petroleum, chemical, and pharmaceutical industries. They also meet the basic anti-static protection needs of the electronics industry. The standards explicitly require that coveralls provide full-body protection with no blind spots to prevent static buildup at seams.

1. EN 1149-1:2006 “Protective clothing—Electrostatic properties—Part 1: Test method for surface resistance”

As the foundational test standard of the EN 1149 series, this standard specifies the test environment, electrode placement, and voltage application specifications for the surface resistance of anti-static coverall fabrics. It serves as the core preliminary screening criterion for determining whether a fabric possesses anti-static properties. The standard stipulates that testing must be conducted after 24 hours of pre-treatment in an environment with a temperature of 23±1°C and relative humidity of 25±5%. The maximum surface resistance of the fabric must be ≤2.5×10⁹ Ω to ensure the fabric possesses basic conductivity, thereby laying the foundation for the electrostatic protection of the finished coveralls. This standard is applicable for the preliminary screening and testing of various anti-static fabrics.

2. EN 1149-3:2004 “Protective clothing—Electrostatic properties—Part 3: Test method for charge decay”

This standard focuses on testing the rate at which fabric dissipates static electricity, with the core requirement that anti-static coverall fabrics must rapidly dissipate static charges to prevent accumulation. The standard specifies that the charge decay time (t50) must not exceed 4 seconds. This means the time required for the static charge on the fabric surface to decay from its initial voltage to 50% must be controlled within 4 seconds. This ensures that static electricity generated by human movement is rapidly dissipated, preventing the generation of static sparks. It meets the protective requirements for flammable and explosive environments while providing technical support for the overall protective performance of the coveralls.

3. EN 1149-5:2018 “Protective clothing—Electrostatic properties—Part 5: Requirements and test methods for garments”

As the core standard for ready-made garments in the EN 1149 series, this standard sets comprehensive requirements specifically for anti-static coveralls and other garments, serving as the primary basis for compliance within the European Union. The standard explicitly requires that coveralls possess the ability to suppress static buildup and rapidly dissipate charges, evaluating details such as seam resistance and the conductivity of accessories to prevent localized static accumulation caused by seams or accessories; For multi-layer designs, the outermost layer must possess antistatic properties and fully cover the inner layers, with non-dissipative layers not exceeding 2 mm in thickness. Additionally, antistatic coveralls must be grounded either directly or through the wearer’s body. Widely used in flammable and explosive environments such as the oil, gas, and chemical industries, this standard is a mandatory compliance requirement for such scenarios.

II. International Electrotechnical Commission Standards (IEC Series): Core Standards for Precision Protection in the Electronics Industry

The anti-static standards established by the International Electrotechnical Commission (IEC) focus primarily on electrostatic-sensitive industries such as electronics and semiconductors. They emphasize the protection of precision electronic components and equipment from electrostatic damage while standardizing the establishment of anti-static protection systems. These standards are highly compatible with anti-static coveralls and are particularly suited to the protective requirements of cleanrooms in the electronics industry.

1. IEC 61340-5-1:2016 “Electrostatic phenomena—Part 5-1: Electrostatic protection of electronic devices—General requirements”

This is the core international standard for anti-static coveralls in the electronics industry, applicable to the entire production process—including manufacturing, processing, assembly, and testing—of electronic components and precision equipment. The standard specifies that the point-to-point surface resistance of anti-static coverall fabrics must be controlled between 1×10⁵ and 1×10¹¹ Ω. This range prevents both static buildup and damage to precision electronic components caused by excessive discharge rates. Additionally, the standard requires an electrostatic charge decay time of less than 2 seconds, with some high-end applications requiring a decay time of less than 0.1 seconds, ensuring rapid dissipation of static electricity. Furthermore, the standard regulates the operating environment and maintenance requirements for coveralls. In conjunction with the establishment of an electrostatic protection system, it safeguards production safety and product quality in the electronics industry. It does not apply to electrostatic protection in environments involving flammable or explosive liquids, gases, or dust.

2. IEC 61340-4-1 “Electrostatics — Part 4-1: Standard test methods for specific applications — Resistance of floor coverings and installed floors”

Although primarily intended for floor coverings