Polyether Polyurethane (PUR) Cable | Abrasion-Resistant Flexible Industrial Cable | Oil & Hydrolysis Resistant
The RST-PUR series Polyether Polyurethane (PUR) Cable is a premium high-flexibility industrial cable designed for continuous-motion applications in automation, robotics, and harsh-process environments. Featuring an ultra-fine Class 6 OFC conductor construction and a tough polyether TPU outer jacket, this cable delivers a validated flex life of over 10 million bending cycles — far exceeding standard PVC or rubber alternatives. The polyether-based jacket resists mineral oils, hydraulic fluids, and hydrolysis, making it equally at home in food-grade washdown areas, outdoor cable carriers, and oil-mist-heavy machine tool environments. Available in 2 to 50 cores, 0.14 mm² to 6 mm² cross-sections, with optional tinned copper braid shielding for EMI-sensitive servo and encoder applications. Fully compliant with IEC 60228 Class 6, RoHS Directive, and CE marking requirements. Custom OEM specifications, colours, and lengths are supported with a 3–5 week lead time. Contact Rousheng’s engineering team for a free sample or project-specific quotation.
Polyether Polyurethane (PUR) Cable | Abrasion-Resistant Flexible Industrial Cable | Oil & Hydrolysis Resistant
The Polyether Polyurethane (PUR) Cable from Shanghai Rousheng Wire & Cable Co., Ltd. is an advanced high-flexibility industrial cable engineered specifically for demanding dynamic applications. Unlike standard PVC or rubber cables, this polyether PUR-jacketed cable delivers exceptional resistance to mechanical abrasion, mineral oils, hydraulic fluids, and hydrolysis — making it the preferred solution for continuous-flex drag chain systems, collaborative robotic arms, CNC machine tools, and harsh outdoor or wet-process environments.
Manufactured under ISO 9001-certified processes and compliant with IEC 60228 conductor standards, each cable is constructed with ultra-fine oxygen-free copper (OFC) strands helically wound for maximum flexibility and fatigue life. The polyether-based PUR outer jacket provides superior resistance to hydrolysis compared to polyester-based alternatives, ensuring service life beyond 10 million bending cycles in continuous-movement applications — a critical advantage in modern automation and industrial IoT deployments.
Whether you need an off-the-shelf specification or a fully custom cross-section, Rousheng’s engineering team works directly with OEM integrators, system builders, and procurement professionals to deliver cables that meet precise mechanical, electrical, and environmental requirements.
Product Model Overview
Quick-reference table for standard configurations of the polyether PUR flexible cable series.
|
Model / Part No. |
Conductor Cross-Section |
No. of Cores |
Outer Diameter (approx.) |
Voltage Rating |
Temperature Range |
Key Feature |
|
RST-PUR-2×0.5 |
0.5 mm² |
2 |
≈ 5.8 mm |
300/500 V |
−40 °C to +105 °C |
Ultra-light; sensor wiring |
|
RST-PUR-4×1.0 |
1.0 mm² |
4 |
≈ 8.4 mm |
300/500 V |
−40 °C to +105 °C |
Standard control cable |
|
RST-PUR-7×1.5 |
1.5 mm² |
7 |
≈ 11.2 mm |
300/500 V |
−40 °C to +105 °C |
Multi-core drag chain |
|
RST-PUR-12×1.0 |
1.0 mm² |
12 |
≈ 13.5 mm |
300/500 V |
−40 °C to +105 °C |
Complex automation bundles |
|
RST-PUR-4×2.5 |
2.5 mm² |
4 |
≈ 12.0 mm |
450/750 V |
−40 °C to +105 °C |
Power + control combined |
|
RST-PUR-CY-4×1.0 |
1.0 mm² |
4 |
≈ 9.6 mm |
300/500 V |
−40 °C to +105 °C |
Shielded; EMI-sensitive envir. |
|
RST-PUR-Custom |
0.14–6 mm² |
2–50 |
Per spec |
Up to 1 kV |
−50 °C to +125 °C |
OEM / project-specific |
All models available in continuous lengths up to 5,000 m on drum. Custom colours, printing, and shielding options on request.
Applications & Use Cases
The polyether polyurethane cable is purpose-built for environments where conventional cables fail prematurely. Typical application areas include:
1. Drag Chain & Cable Carrier Systems
The most demanding dynamic application — cables must withstand continuous bending around a fixed radius at high cycle frequencies. The polyether PUR jacket’s high tensile strength (>50 MPa) and elastic memory ensure the cable returns to its original shape after each flex cycle, preventing kinking, cracking, and core wire fatigue.
- CNC machining centres and turning centres
- Gantry cranes and linear transfer systems
- Pick-and-place automation and palletising robots
- 3D-axis Cartesian robots and linear modules
2. Robotic Arm & Servo Motor Wiring
Where cables twist, flex, and rotate simultaneously, the ultra-fine stranded OFC conductors distribute mechanical stress evenly across the cross-section. The oil-resistant PUR sheath protects against lubricant ingress in servo-driven joints, maintaining consistent signal integrity for encoder feedback and power transmission.
- 6-axis industrial robots (KUKA, FANUC, ABB compatible)
- Collaborative robots (cobots) in assembly and inspection lines
- Servo encoder cables in precision motion control
3. Outdoor & Wet-Process Environments
Polyether-based polyurethane resists hydrolysis — the chemical breakdown caused by prolonged moisture exposure — far better than polyester PUR. This makes the cable suitable for:
- Food and beverage processing lines (washdown-rated)
- Outdoor cable carriers on port cranes and ship-loader systems
- Agricultural machinery and irrigation automation
- Wind turbine nacelle wiring subject to humidity cycling
4. Oil, Chemical & Mining Industries
The PUR jacket withstands sustained contact with mineral oils, hydraulic fluids, biodiesel, and mild chemicals without swelling or surface degradation. Abrasion resistance (Taber ≥ 300 cycles at 1 kg load) protects cables routed through metal conduits, cable trays, or across rough surfaces in:
- Hydraulic power units and valve manifold assemblies
- Mining equipment: continuous miners, shuttle cars, roof bolters
- Steel plant rolling mills and ladle handling systems
Technical Specifications
Conductor
|
Parameter |
Specification |
|
Material |
Bare or tinned oxygen-free copper (OFC), Class 6 / IEC 60228 |
|
Strand construction |
Ultra-fine multi-strand, helically wound with counter-lay layers |
|
Cross-section range |
0.14 mm² – 6 mm² (custom up to 50 mm²) |
|
DC resistance |
Per IEC 60228 / VDE 0295 Class 6 |
Insulation
|
Parameter |
Specification |
|
Material |
Flexible PVC or cross-linked PE (XLPE) — project dependent |
|
Colour coding |
DIN VDE 0293-308 or custom |
|
Dielectric strength |
≥ 2 kV AC for 5 min (core-to-core) |
Outer Jacket — Polyether PUR
|
Parameter |
Specification |
|
Material |
Polyether-based thermoplastic polyurethane (TPU/PUR) |
|
Tensile strength |
≥ 50 MPa |
|
Elongation at break |
≥ 350% |
|
Abrasion resistance |
Taber Abraser ≥ 300 cycles (CS-17 wheel, 1 kg load) |
|
Oil resistance |
Excellent — mineral oil, hydraulic fluid, biodiesel |
|
Hydrolysis resistance |
Superior (polyether > polyester PUR) |
|
UV resistance |
Standard: moderate | Enhanced UV grade available |
|
Flame retardancy |
IEC 60332-1 (single wire); IEC 60332-3 (bundle) — specify on order |
|
Shore A hardness |
85 ± 5 Shore A |
|
Colours available |
Black (standard); RAL colours on request |
Electrical & Mechanical Performance
|
Parameter |
Specification |
|
Rated voltage |
300/500 V (standard) | 450/750 V | 0.6/1 kV (on request) |
|
Operating temperature |
−40 °C to +105 °C (static: −50 °C to +125 °C available) |
|
Minimum bending radius |
Dynamic: 7.5× OD | Static: 4× OD |
|
Flex life |
≥ 10 million cycles (dynamic drag chain, 7.5× OD radius) |
|
Shielding options |
Unshielded | Tinned copper braid (≥85% coverage) | Al-foil + drain wire |
|
Certifications |
CE, ROHS; UL/CSA, REACH available on request |
Why Choose Rousheng Polyether PUR Cable?
|
Feature |
Rousheng PUR Cable |
Standard PVC Cable |
|
Flex life |
> 10 million cycles |
< 1 million cycles |
|
Oil resistance |
Excellent |
Poor (swelling & cracking) |
|
Hydrolysis resist. |
Superior (polyether base) |
N/A |
|
Cold flex |
−40 °C (−50 °C available) |
Limited to −15 °C ~ −25 °C |
|
Abrasion |
High (Taber ≥ 300 cycles) |
Low |
|
Weight |
Lighter than rubber |
Similar |
|
Custom capability |
Full OEM / project support |
Standard only |
Frequently Asked Questions (FAQ)
Q1: What is the difference between polyether and polyester PUR cable jackets?
Polyether polyurethane offers significantly better resistance to hydrolysis (moisture-driven degradation) and microbiological attack, making it the correct choice for food processing, outdoor, or humid environments. Polyester PUR is harder and has slightly better abrasion performance but degrades in moist conditions over time. For most industrial automation applications, polyether PUR is the preferred specification.
Q2: Can I use this cable in a drag chain system rated for 10 million cycles?
Yes. Our standard RST-PUR series is validated for ≥10 million flex cycles at a dynamic bending radius of 7.5× the cable outer diameter, which meets or exceeds the requirements of most drag chain manufacturers (Igus, Helukabel, Tsubaki, etc.). For applications exceeding this rating, please contact our engineering team for an optimised strand configuration and extended bending-life validation.
Q3: Do you offer shielded versions for servo and encoder applications?
Yes. The RST-PUR-CY series features a tinned copper braid shield with ≥85% optical coverage, suitable for servo motor feedback cables and encoder signal lines operating in high-EMI environments. An aluminium-foil plus drain wire option is also available for very high-frequency shielding requirements.
Q4: What certifications does the cable carry?
All standard products carry CE marking and comply with RoHS Directive 2011/65/EU. UL/cUL listing and REACH compliance documentation are available on request. Our production facility holds ISO 9001 certification, and all cables are manufactured to IEC 60228 conductor standards. Third-party test reports from CNAS-accredited laboratories are available upon request.
Q5: What is the minimum order quantity (MOQ) and lead time?
For standard catalogue sizes, the MOQ is 100 m per item with stock availability for common sizes (4×1.0 mm², 7×1.5 mm², etc.). Custom cross-sections, colours, and shielded versions typically require 500 m MOQ with a 3–5 week production lead time. Contact our sales team at Jerry@rstlkable.com for a detailed quote and delivery schedule.
Q6: Can you supply the cable with a UL-rated jacket for North American markets?
Yes. A UL-listed variant with a UL-rated PUR compound is available for customers requiring compliance with NEC or UL 508A panel-wiring standards. Please specify ‘UL grade’ when submitting your inquiry, along with the applicable UL style number if known.
About the Manufacturer — Authority & Quality Assurance
Shanghai Rousheng Wire & Cable Co., Ltd. (上海柔胜电线电缆有限公司) has over a decade of specialised experience in the R&D, manufacture, and global supply of high-flex and specialty cables. Our engineering team of 10+ cable specialists operates a purpose-built production facility at No. 2591 Fengzhe Road, Fengxian District, Shanghai — equipped with:
- Multi-axis lay-up and extrusion lines calibrated for ultra-fine stranding (Class 6 IEC 60228)
- In-house cable flex-life testing rigs capable of validating ≥10 million bend cycles
- Automated spark-test and Hi-Pot testing on 100% of manufactured lengths
- ISO 9001 quality management system with full batch traceability
We supply directly to OEMs, system integrators, and distributors across Europe, North America, Southeast Asia, and the Middle East. Product samples, technical data sheets (TDS), material safety data sheets (MSDS), and independent laboratory test reports are available upon request for qualification purposes.
Get a Quote or Request a Sample
Ready to specify the right polyether PUR cable for your application? Our technical sales team responds within 24 hours.
Email: Jerry@rstlkable.com | Phone: +86-021-50759965 | Mobile: +86-13482197396
- Submit an online enquiry form with your specification (cores × cross-section, length, environment)
- Download the full technical data sheet (PDF) — available on request
- Request a free cable sample before placing your production order
- Ask about OEM custom labelling, drum packaging, and DDP shipping options
