Anti-static PVC grid curtain test report: four tests and full measured data
Once an anti-static curtain is hung, nobody checks again whether it still works. Yet it is the only physical interface between the line and the outside, and people and carts pass through it every day: triboelectric charging, charge build-up and discharge all happen right here.
This page presents the full third-party test report for JIAHON anti-static PVC grid curtains, with point-by-point data for four tests and what those numbers mean on the line.
1. Report details
| Item | Details |
|---|---|
| Report no. | UK2511070006 |
| Product | Anti-static grid curtain |
| Testing laboratory | Guangdong Youke Testing & Certification Co., Ltd. |
| Samples | 6 pieces |
| Received | 4 November 2025 |
| Test period | 6 to 10 November 2025 |
| Issued | 11 November 2025 |
| Conclusion | Point-to-point resistance, system resistance, static decay and triboelectric voltage all meet the relevant standards and requirements |
2. Test conditions
| Item | Condition |
|---|---|
| Preconditioning | 23.0 ± 2.0 °C, 50.0 ± 5.0% RH, 24 hours |
| Actual test environment | 23.3 °C, 50.9% RH |
| Sampling | 6 samples, 3 positions each, front and back measured separately |
| Test voltage for resistance | 100 V |
| Specimen placement | On an insulating surface for point-to-point resistance |
All data were measured at 50% RH. The surface conduction of anti-static materials mostly depends on absorbed moisture, so real performance in dry seasons or low humidity will be worse than the report figures. This is not a fault of the report but a premise to keep in mind when reading it; if your plant’s winter humidity is often below 40%, retest in your actual environment.
3. What the four tests measure
- Point-to-point resistance: resistance between two points on the curtain, showing whether charge can move across the surface.
- System resistance: resistance from the material to the grounding system, showing whether charge can actually leave the material. Good point-to-point resistance with poor system resistance means charge moves across the curtain but cannot get out. Look at both together.
- Static decay: time for an applied voltage to decay to a set fraction. This directly shows how fast charge dissipates.
- Triboelectric voltage: how much charge the material itself carries after simulated friction. The first three tests measure whether charge can leave; this one measures how much charge is generated in the first place, the root control.
4. Static decay: all six samples pass
| Sample | Decay time (+V) | Decay time (−V) | Result |
|---|---|---|---|
| #1 | 0.3 s | 0.2 s | Pass |
| #2 | 0.4 s | 0.3 s | Pass |
| #3 | 0.3 s | 0.2 s | Pass |
| #4 | 0.2 s | 0.3 s | Pass |
| #5 | 0.2 s | 0.2 s | Pass |
| #6 | 0.3 s | 0.2 s | Pass |
All six samples decayed in 0.2 to 0.4 seconds in both polarities, with good consistency. This is the figure closest to what the line experiences: charge from a person or cart passing through dissipates in under half a second rather than staying on the curtain for the next contact.
5. Triboelectric voltage: specification ±100 V, measured about −20 V
| Sample | Front average | Back average | Limit | Result |
|---|---|---|---|---|
| #1 | −20.00 V | −24.00 V | < ±100 V | Pass |
| #2 | −20.67 V | −24.67 V | < ±100 V | Pass |
| #3 | About −19 V | About −21 V | < ±100 V | Pass |
Measured values are about one fifth of the limit, a comfortable margin. Note that all readings are negative and tightly grouped, meaning the charging polarity between this material and the rubbing material is consistent and its behavior stable, not swinging between positive and negative.
6. Resistance: one to two orders of magnitude difference between front and back
This is the item in the report most worth noting. For point-to-point resistance, for example:
| Sample | Front average | Back average | Acceptance range |
|---|---|---|---|
| #1 | 5.04 × 10⁶ Ω | 1.79 × 10⁸ Ω | < 1.0 × 10⁹ Ω |
System resistance shows the same two-sided difference: samples #3 to #5 are in the 10⁶ Ω range on the front and 10⁷ Ω on the back. Both sides pass, but the difference means this is a material with asymmetric sides.
In practice, the two sides should not be hung at random. If your ESD control program specifies resistance for the side facing the process area, confirm which side faces inward before installation and write it into the work instruction, so it is not reversed at replacement. In the report, sample #6 shows front and back values opposite to #3 to #5, which is also a reminder: “front” and “back” are measurement labels, not fixed factory markings. Base installation on identifiable features of the material itself rather than on verbal “front/back” descriptions.
7. Acceptance and maintenance
- Require all four: a report with only point-to-point resistance is not enough. System resistance decides whether charge can reach ground, static decay decides how fast, and triboelectric voltage decides how much is generated. Missing any one makes compliance incomplete.
- Installation is complete only when grounded: passing system resistance does not mean the line is grounded. If the curtain is hung without a ground connection, the system resistance result is meaningless on the line. Measure on site after installation.
- Retest periodically: PVC curtains collect oil and dust, and surface changes affect resistance. Include them in periodic checks with a surface resistance meter on site.
- Mind the cleaning method: ordinary detergents may damage the anti-static surface treatment. Confirm the cleaning method with the supplier first.
- Report age: this report was issued in November 2025. Many customers require test reports within one to three years.
FAQ
Why four tests; isn’t resistance enough? They measure different stages. Resistance (point-to-point and system) measures whether charge can leave, static decay measures how fast, and triboelectric voltage measures how much is generated initially. A material may pass resistance but generate high triboelectric charge, or pass resistance but be ineffective because the grounding path is broken. The four together give the full picture.
Is 0.2–0.4 s decay good? It is good performance for an anti-static material. In practice, compare it with the decay limit in your ESD control program; requirements differ between standard systems and customers, so judge the report data against the requirement you use.
Do different front and back resistances affect use? Both sides pass, so general use is fine. But if your control program has a specific requirement for the side facing the process area, control the installation direction. Record the direction and how to identify it in the work instruction.
Is it anti-static as soon as it is hung? The material’s properties are one thing; whether the line has an effective discharge path is another. System resistance measures material to ground terminal, assuming the line actually has a ground connection. Hung on insulating brackets, the charge has nowhere to go.
Does it lose effect over time? Yes. Oil, dust or detergents that damage the anti-static treatment change surface resistance. Include it in periodic checks with a surface resistance meter, rather than relying only on the factory report.
The data were measured at 50% RH; what about dry seasons? Anti-static materials mostly conduct through absorbed surface moisture, so in low humidity resistance rises and decay slows. If your winter humidity is often below 40%, retest in your actual environment, or add active neutralization such as ionizers.
Standards referenced
Please refer to the current versions published by each organization.
- ANSI/ESD S20.20, ESD control program standard — EOS/ESD Association, Inc.
- IEC 61340-5-1:2024, Electrostatics – Part 5-1, Ed. 3.0 — International Electrotechnical Commission (IEC)
- Overview of ESD standards (including ANSI/ESD STM11.11 surface resistance of planar materials and ANSI/ESD S541 packaging materials)
We supply the items mentioned on this page.
Related: Anti-static PVC curtains / sheets · SIMCO FMX-004 electrostatic fieldmeter · ACL-800 weighted surface resistance tester · ESD mats
From: JIAHON Engineering
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