Cable Jacket Materials: PVC vs. PUR vs. TPE for PROFINET Applications

By Eileen Harvey 

Key Takeaways

• The jacket is a PROFINET cable’s first line of defense against mechanical, chemical and environmental stress, and the wrong choice can lead to signal loss and plant downtime.
• PVC is the low-cost choice for fixed, indoor installations with little exposure to oils or chemicals.
• PUR offers high flexibility and abrasion and oil resistance, making it the go-to for drag chains, robotics and motion control.
• TPE handles extreme temperatures and harsh chemicals and is halogen-free, suiting food and beverage, chemical plants and outdoor use.
• Choose a jacket based on movement, environmental exposure, budget versus longevity and compliance needs, and make sure the cable meets the right PROFINET Type (A, B or C).

When we think of PROFINET cables, the focus usually falls on data transmission, shielding or conductor types. Yet one critical element often overlooked is the cable jacket material. The jacket acts as the first line of defense against physical, chemical and environmental stresses. Choosing the right jacket material is essential for ensuring not just performance, but also cable longevity and overall network reliability. 

In industrial environments where cables are exposed to oil, UV radiation, temperature fluctuations and continuous movement, jacket material can make or break your system. The three most common jacket types used for PROFINET cables are PVC (polyvinyl chloride), PUR (polyurethane) and TPE (thermoplastic elastomer). 

PVC remains the industry default: affordable, easy to install and reliable for fixed, indoor runs. PUR is prized for its flexibility and abrasion resistance in high-motion environments, making it the go-to for robotics and drag chains. TPE stands up to extreme temperatures and harsh chemicals, making it the premium choice for the toughest conditions.

So how do you know which one is right for your PROFINET application? First, let’s look at what a cable jacket actually does, then break down each material in detail before comparing all three side by side.

The Role of Cable Jackets in PROFINET Cables

The jacket on a PROFINET cable is more than just a cover—it is a protective barrier. It provides mechanical protection, safeguarding against bending, abrasion and crushing forces. It offers chemical resistance, preventing damage from oils, solvents and cleaning agents. It enhances environmental durability, shielding against moisture, UV radiation and extreme temperatures. And it maintains signal integrity, protecting shielding layers from external influences that could introduce electromagnetic interference (EMI). A poor jacket choice could lead to premature cable wear, signal loss and even plant downtime. For more on keeping interference out, see our guide on how to reduce EMI with proper shielded cable selection.

With that in mind, let’s start with the most widely used material: PVC.

PVC Jackets 

Key Features: PVC jackets are cost-effective and widely available, offering flame-retardant properties that comply with basic safety standards. They are easy to strip, install and terminate while providing moderate mechanical strength. Learn more about what flame ratings mean in our article on cable flammability ratings.

Best Suited For: These jackets perform best in fixed installations such as control cabinets, trays or conduits. They are ideal for indoor environments with limited exposure to oils or chemicals and are often chosen for budget-sensitive applications. 

Limitations: PVC jackets have poor resistance to oils, solvents and chemicals. Their limited flexibility makes them unsuitable for continuous bending, and they degrade faster in outdoor environments due to UV exposure. But when cables face constant motion or abrasion, PVC’s limits are exactly where PUR was designed to take over.

PUR Jackets 

Key Features: PUR jackets provide high flexibility and excellent abrasion resistance. They are resistant to oils, coolants and cleaning agents, making them tough enough for drag chain and robotic applications. They also offer good UV resistance. 

Best Suited For: These jackets are ideal for motion control and robotics applications where cables bend and twist continuously. They perform well in automotive and machining environments with oil and coolant exposure and are suitable for outdoor use requiring UV resistance. In these continuous-motion applications, bend radius matters as much as jacket material; see our guide to proper bending radius and flex-life.

Limitations: PUR jackets are higher in cost compared to PVC and have limited temperature resistance compared to TPE, struggling in very high heat. If PUR’s heat limits rule it out, TPE fills the gap, especially in extreme or chemical-heavy environments.

TPE Jackets 

Key Features: TPE jackets withstand extreme temperatures both high and low. They are halogen-free, environmentally friendly and flame-retardant with superior chemical resistance to oils, acids and solvents. They are also highly flexible and durable. 

Best Suited For: These jackets are commonly used in the food and beverage industry, where chemical cleaning and strict hygiene standards apply. They are well suited for outdoor use thanks to UV, ozone and weather resistance and perform effectively in energy and chemical plants exposed to harsh chemicals and temperature variations. 

Limitations: TPE jackets are more expensive than PVC and PUR and are less common in standard installations, often reserved for specialized cases. With all three materials on the table, here’s how they compare side by side.

Comparative Analysis: PVC vs. PUR vs. TPE

Applications and Use Cases

PVC is ideal for control cabinets, wiring ducts or fixed industrial setups where cost is a factor. PUR is found in robotics, automotive plants and drag chains where cables are under constant movement. TPE is used in food processing, chemical industries or extreme outdoor conditions. Here’s how to turn these trade-offs into an actual decision.

Choosing the Right Jacket Material

When selecting a PROFINET cable jacket, consider four essential matters. First is movement requirements, such as fixed vs. flexible vs. continuous motion. Second is environmental exposure—oils, UV, chemicals or temperature. The third consideration is budget vs. longevity, with PVC saving upfront costs and PUR/TPE reducing long-term maintenance. Fourth is compliance needs: food-grade, halogen-free or flame-retardant requirements. 

Recommendations for PROFINET Installations

For budget-sensitive, fixed installations, go with PVC. For dynamic machinery and robotics, choose PUR to ensure durability. For harsh, chemical-heavy environments, opt for TPE for maximum resistance. Once you’ve narrowed down a material, these practical checks help you avoid costly mistakes during selection and installation.

Tips and Best Practices

• Don’t over-specify: PVC is sufficient for simple, fixed runs. 

• Plan for mechanical stress: If motion is frequent, PUR or TPE is worth the extra investment. 

• Think long-term: Spending more upfront for TPE may reduce replacement costs in harsh environments. 

• Check standards compliance: Ensure cables meet PROFINET Type A, B or C specifications. Type A cables are for fixed installations, Type B for flexible installations with occasional movement and Type C for continuous motion such as drag chains. Our article on PROFINET cable categories explains how Cat5e, Cat6 and Cat7 fit in.

Facts You Should Know

• PVC cables have been in use for decades and remain the most widely installed jacket material worldwide. 

• PUR jackets extend cable life in robotic arms by up to 10x compared to PVC. 

• TPE jackets can survive sterilization processes in food factories, where others would quickly degrade. 

Still have questions after all that? Here are the ones we hear most often.

H2: FAQs About PROFINET Cable Jacket Materials

Q1: What is the best jacket material for PROFINET cables?

A: There is no single best material. PVC is the most cost-effective option for fixed, indoor installations, PUR is best for continuous motion and oil exposure, and TPE is best for extreme temperatures, harsh chemicals and food and beverage applications.

Q2: What is the difference between PROFINET Type A, B and C cables?

A: The types are defined by how much movement the cable must handle. Type A cables are for fixed installations, Type B cables are for flexible installations with occasional movement or vibration, and Type C cables are designed for continuous motion, such as drag chains and robotic arms.

Q3: Is PUR or PVC better for drag chain applications?

A: PUR is the better choice. Its high flexibility and abrasion resistance allow it to withstand constant bending and movement, while PVC is too rigid for continuous motion and wears out quickly.

Q4: Can PVC PROFINET cables be used outdoors?

A: PVC is generally not recommended for long-term outdoor use, because UV exposure causes it to degrade faster. For outdoor installations, PUR or TPE jackets offer much better UV and weather resistance.

Conclusion

The choice of PVC, PUR or TPE jacket for your PROFINET cables depends entirely on your application environment and performance needs. PVC works for fixed installations at low cost, PUR dominates in motion-heavy setups and TPE is the premium choice for extreme conditions. 

By matching jacket material with application, you can improve system reliability, reduce downtime and extend the lifespan of your PROFINET infrastructure. 

Explore the full range of TKD Kabel through L-com. We’ll fill your orders fast, with same-day shipping on all qualified, in stock, online orders received Monday through Friday before 5 p.m. EST. For TKD-related inquiries, connect with our U.S-based TKD expert Eileen Harvey at eharvey@infiniteelectronics.com.