Igus e-chain stays at the highest cleanroom class even after 60 million double strokes

By OEM Update Editorial January 17, 2023 4:11 pm IST

e-skin flat energy chain: igus proves abrasion resistance with the first industry test of its kind.
Cleanroom-compatible energy chains from the e-skin flat series still qualify for the highest cleanroom class even after 1.5 years of continuous use and 60 million double strokes. A test unprecedented in the industry led to this result. It was carried out in a cleanroom laboratory set up by motion plastics specialist igus in cooperation with the Fraunhofer Institute for Manufacturing Engineering and Automation (IPA).
Dusting the living room can be annoying. You scarcely have time to enjoy the spotless surfaces before the first specks of dust begin to collect again. Manufacturers of displays and semiconductors have the same problem – but with more severe consequences. Any tiny particle, even one invisible to the naked eye, can damage electronic components. Therefore, the strictest cleanroom class – ISO Class 1 according to DIN 14644- 1 – must contain no more than ten 0.1-micrometre (0.0001-millimetre) particles per cubic meter of ambient air. To achieve this purity level, all cleanroom production system component suppliers must meet the strictest requirements. To this end, igus has developed the e-skin flat, a flat cable guidance system made of abrasion-optimised high performance plastic that ensures reliable, particle-free guidance of power and data cables in moving production systems and is thus suitable for ISO Class 1.
Unique test setup: e-chain runs for 1.5 years in a dirty and dusty environment

Andreas Hermey, Development Manager for e-chain systems at igus, says, “The e-skin flat cleanroom energy chain is ideal for robots and other automation systems in electronics production in such areas as semiconductors and display production. It is so abrasion-resistant that contamination by airborne particles is no longer an issue.” However, the intensity of the high-performance plastic’s particle abrasion after long, intensive use has yet to be determined. To determine its details, igus launched a test setup unique in the industry. Part one of the experiment was conducted in igus’s laboratory. The energy chain moved in an environment with normal levels of dust and dirt for around 1.5 years, during which it performed 60 million double strokes.
igus e-chain stays at the highest cleanroom class even after 60 million double strokes
Part two of the experiment took place in the cleanroom laboratory in Cologne, conducted by igus in cooperation with the Fraunhofer Institute for Manufacturing Engineering and Automation (IPA), igus’s development and certification partner, for more than 17 years. The heart of the setup was three so-called laminar flow boxes equipped with high-performance filters that enable tests in uncontaminated air. The wornout e-chain was in motion there for over 100 minutes. Sensors detected particle concentration in the surrounding air. “Even after 60 million double strokes, our e-skin flat e-chain still qualified for the highest cleanroom class,” says Hermey. “This finding offers cleanroom production facility operators additional confidence.”
Modular concept for flexible filling
The e-skin flat features extreme abrasion resistance and a modular design. If a profile into which cables have been fitted is defective, the user can change that module. Many other solutions available on the market would require the entire system to be replaced. The module connection also allows individual profiles to be interlinked. The cable guidance system thus grows in line with requirements and ensures investment security. In combination with the specially harmonised chain flex CFCLEAN stranded structure, the complete system offers an incredibly high level of reliability. The entire system also has globally recognised certification from the well-known US Underwriters Laboratories (UL) organisation. Finally, the cable guidance systems are 9dB(A) quieter and cost 20 percent less than standard ribbon cables.