Technical Guide: POM (Polyoxymethylene) vs. Other Plastics in Curtain Components
Technical friction analysis: advantages of injected Polyoxymethylene (POM) over non-technical plastics in curtain mechanisms.
For a professional installer, there is nothing more frustrating (or more expensive) than receiving a client call months after project completion saying: “The curtain jams” or “The mechanism has deformed.”
Often the problem is not in the aluminum profile or the motor, but in a tiny part that costs just a few cents: the runner or the internal gear.
In the curtain systems industry, the use of “low-cost” plastics (polystyrene, polypropylene or low-density polyethylene) is the main cause of premature wear. At Rutperfil, after 50 years of injecting our own parts, our standard is clear: POM (Polyoxymethylene).
In this technical guide we analyze the physics of materials and why POM is our guarantee against wear and deformation.
1. What is POM and why is it the “Steel of Plastics”?
Polyoxymethylene (also known as Acetal or polyacetal) is not a commodity plastic; it is an engineering thermoplastic. It is used in automotive, watchmaking and robotics for high-precision gears.
When we inject runners, gliders or roller-blind gears in virgin POM, we give the part three key physical properties for your installation:
- Self-lubrication: POM has an extremely low coefficient of friction. It slides naturally over the extruded aluminum of the track without any grease that would eventually trap dust and jam the system.
- Mechanical Fatigue Resistance: In heavy roller blinds (such as Mega or Titan systems), the gears are under constant tension. POM does not deform or take a permanent set under continuous load.
- Elastic Memory: A support or click-fit mechanism made of POM provides the exact pressure needed to anchor the part and instantly recovers its original shape, eliminating play.
2. Comparative Table: On-Site Performance
To understand why low-cost imported systems fail after only a few years, it is enough to compare the thermal and mechanical behavior of the materials against our injection standard:
| Technical Characteristic | Other Plastics | Polyoxymethylene (POM) | Impact on Installation |
|---|---|---|---|
| Friction on Tracks | High. Generates micro-plastic shavings when rubbing against aluminum. | Minimal. Chronic smooth and silent sliding. | Prevents jams and the dreaded “drag noise”. |
| Thermal Resistance | Crystallize and become brittle under direct sunlight through glass. | High thermal stability. Maintains mechanical properties against UV rays. | Eliminates runner breakage (e.g. during curtain washing). |
| Moisture Absorption | Absorb ambient humidity, swelling in coastal areas. | Almost nil (0.2 %). Perfect dimensional stability. | Internal mechanisms never lock over time. |
| Static Maximum Load | Low. Deform over time with heavy fabrics. | Very high. Maintains geometry indefinitely under high loads. | Allows technical fabrics or high-grammage blackout. |
3. The Manufacturer’s Advantage: Controlled Injection in Barcelona
Knowing a part is POM is not enough. The manufacturing process is critical. Many Asian-imported components use POM that does not meet European manufacturing standards in order to cut costs, compromising the polymer’s structure and specifications.
In our Barcelona factory, Rutperfil injection machines work exclusively with prime-grade pellets under strict temperature control and high-precision steel molds. By not relying on supply chains thousands of kilometers away, we guarantee that every Perfect Wave glider or roller-blind mechanism you install today will have exactly the same density and resistance as the ones you installed five years ago.
The next time you prepare a quote, remember: hardware savings are always paid for in after-sales service. Working with technical components injected in POM saves you hours of maintenance and protects your reputation as an installer.
TECHNICAL SUMMARY FOR PROJECT SPECIFICATION
- Recommended friction material: Injected Polyoxymethylene (POM).
- Critical applications: Demultiplied gears, Perfect Wave gliders and high static-load supports.
- Advantages over standard polymers: Coefficient of friction <0.25, moisture absorption <0.2 %, zero crystallization from UV exposure behind glass.
- Load precaution: The static load limit of POM runners varies drastically depending on the alloy of the extruded aluminum profile. To verify the exact tolerances (kg/linear m) required by the CTE in Contract installations, it is essential to consult the official Rutperfil catalog.
Do you need a Curtain Systems Supplier for your next project?
If you are looking for a supplier that understands your technical requirements and shares your sustainability values, we are here to help. Our team is ready to advise you on the ideal curtain system for your project.
- 📞 Call us: Contact our Technical Office directly at 937 50 85 45.
- 📧 Write to us: Send your questions to info@rutperfil.com or rutperfil@rutperfil.com.
We also invite you to download our complete curtain systems catalog, where you will find detailed specifications of all our products. And if you want to keep reading about where our industry is heading, don’t miss our article on The Future of the B2B Sector in Curtain Systems Supply.
Do You Need a Window Treatment Systems Provider for Your Next Project?
If you are looking for a supplier who understands your technical requirements and shares your sustainability values, we are here to help. Our team is ready to advise you on the ideal curtain system for your project.
-
📞 Call us: Contact our Technical Office directly at 937 50 85 45.
-
📧 Email us: Send your inquiries to info@rutperfil.com or rutperfil@rutperfil.com.Ajustes
Furthermore, we invite you to download our complete curtain systems catalog, where you can review our product specifications in detail. And if you want to keep reading about where our industry is heading, don’t miss our article on The Future of the B2B Sector for Window Treatment Systems Providers.