PolyPro FR® Cable Tray Liners
We manufacture cable tray liners from PolyPro FR®, our UL-listed flame-retardant polypropylene material built for electrical and thermal insulation inside power system equipment. In data centers and telecommunications facilities, we supply these liners to line the inside of cable trays so that fiber, copper, and power cables run cleanly through the tray without snagging on tray rails, welds, or rough edges. Because we produce PolyPro FR® ourselves in the United States, we can supply cable tray liners in the widths, thicknesses, and colors that match your existing tray system rather than asking you to adapt your installation to a stock size.
HOW OUR CABLE TRAY LINERS IMPROVE CABLE MANAGEMENT
A bare cable tray has exposed rails, welded joints, and edges that catch cable jacketing during pulls and future moves, adds, and changes. Our cable tray liners cover that surface with a smooth polypropylene layer, which reduces the chance of nicking a jacket during installation and keeps cables from tangling with each other as more runs are added over time. They also cover the open view into the tray, so a rack row or overhead run looks finished instead of exposing a mass of cabling to anyone walking the aisle. Installation is straightforward: our liners are cut to fit standard tray widths and lay into the tray without requiring special tools or hardware.
PROPERTIES BEHIND OUR CABLE TRAY LINERS
The reason PolyPro FR® works for this application comes down to three properties we build into the material at extrusion: flame retardance, dielectric performance, and resistance to the moisture and chemicals found in a data center or telecom equipment room.
FLAME RETARDANT RATING
PolyPro FR® is UL listed under file E228440 and carries a UL 94 V-0 rating across the full thickness range we produce, 0.005 inches to 0.125 inches. That rating matters directly for cable tray liners because the material sits alongside live cabling for the life of the installation, so it needs to self-extinguish rather than sustain a flame if an electrical fault occurs nearby.
DIELECTRIC STRENGTH & MOISTURE RESISTANCE
PolyPro FR® has strong dielectric breakdown strength, which gives you a layer of electrical insulation between cables and the metal tray itself. It also has very low water absorption, so the liner will not swell, warp, or lose its insulating properties in a mechanical room or facility with fluctuating humidity.
TEMPERATURE RESISTANCE
Per UL testing, PolyPro FR® holds up to 110°C. Cable trays running above racks or near power distribution equipment can see elevated ambient heat, and the liner needs to hold its shape and insulating properties at those temperatures rather than becoming brittle or deforming.
FABRICATION OPTIONS FOR CABLE TRAY LINERS
We supply PolyPro FR® cable tray liners as roll stock, cut sheet, or fully fabricated parts sized to your tray, in black or white. Every thickness we produce is available in a 48 inch width, which lets your fabricator nest liner pieces more efficiently and cut down on scrap compared to narrower stock. If your tray uses a nonstandard width, a radius, or a run of tees and crosses, we can die cut, laser cut, water jet cut, or CNC machine the liner to match, and we can heat form or thermoform it where the tray geometry calls for a shaped piece rather than a flat sheet. Additional thicknesses and colors beyond our standard offering are available on request.
Manufactured in the United States, PolyPro FR®, flame retardant electrical insulation, features exceptional dielectric strength, high chemical and moisture resistance, and an elevated temperature rating. These properties make it an ideal material in virtually any power insulation environment. PolyPro FR® is manufactured and converted in multiple methods to meet the unique requirements of our customers.
End-User Applications
- Data Centers and Telecommunications
- Electric Vehicle Battery
- Battery Chargers
- Solar Inverters and Combiner Boxes
- Consumer Electronics
- UPS, DC Power and Rectifiers
- Low and Medium Voltage Switchgear
- Power Distribution Equipment
- Single Phase and Three Phase and Power Supplies
Battery Cell
PolyPro FR® is a flame-retardant insulation for battery cells and modules that provides dielectric protection in custom shapes without losing form in elevated temperature or cell expansion.
Applications
- Cell Spacers
- Module Covers
- Module Liners
Battery Pack
PolyPro FR® is a flame-retardant insulation for battery packs. It provides dielectric protection at a low profile to prevent surges and arcing between the pack and module even at high temperatures.
Applications
- Battery Pack Liners
- Busbar Insulation
- BMS Insulation
Battery Charger
Power Systems with a DC and AC battery charger require flexible insulation to prevent surges and arching. PolyPro FR® is a flame-retardant solution to help the unit run as efficiently as possible.
Applications
- Power Supply Insulation
- Battery Insulation
- Enclosure Insulation
DATA CENTER & TELECOMMUNICATION APPLICATIONS
The Gund Company understands the importance of airflow management in a data center. While proper airflow is essential for equipment functionality, it is also one of the easiest ways to reduce energy costs associated with running a data center.
PolyPro FR® material composition makes it an excellent choice for airflow management applications such as blanking panels and air baffles. PolyPro FR® can also be used for cable tray liners and holders, preventing cables from tangling or snagging in a cable tray.
Cable Tray Liners
- Easy to install
- Reduces cable snagging, prevents cable tangling
- Blocks unsightly views or cables
- Learn more about cable tray liners
Blanking Panels
- Prevents cool air from escaping empty rack space
- Reduces energy costs associated with cool air generation
- Custom sizes to meet any rack
Air Baffles
- Directs airflow and prevents seepage into unmanaged airflow areas
- Reduces costs associated with thermal management
- Formable to any shape to match any layout
REQUEST A CABLE TRAY LINER QUOTE
Cable tray liners are one piece of the airflow management work we support in data centers. We also produce PolyPro FR® blanking panels, which close off empty rack space so cold air stays where it is supposed to instead of recirculating with exhaust air, and PolyPro FR® air baffles, which direct airflow around rack rows and prevent it from leaking into unmanaged space. Facilities that use all three, tray liners for cable pathways, blanking panels for open rack units, and air baffles for directing airflow, get a tighter overall airflow management setup than addressing cable management alone.
FREQUENTLY ASKED QUESTIONS
No. A cable tray cover sits on top of the tray and closes it off from above, usually to keep out dust or prevent accidental contact with cables from outside the tray. A cable tray liner sits inside the tray, along the bottom and sides, to protect the cables themselves from the tray structure. We supply liners rather than covers, since our focus with PolyPro FR® in this application is protecting cable jacketing and providing dielectric separation from the tray.
Because we cut PolyPro FR® to size rather than selling a single fixed profile, we can fabricate liners for wire basket trays, ladder trays, and solid bottom trays. The fabrication method changes based on the tray type. A solid bottom tray typically takes a flat cut sheet, while a wire basket or ladder tray may need the liner heat formed or cut with tabs so it seats correctly against the rails instead of sagging between them.
The liner itself is not a load-bearing component and does not change the tray’s structural fill rating, which is set by the tray manufacturer based on the tray’s construction. Our role is supplying an insulating, flame-retardant layer inside the tray. Any fill calculations and code compliance for the cable tray installation remain governed by the tray manufacturer’s ratings and the applicable NEC requirements for your project.
Both. We supply PolyPro FR® as roll stock or cut sheet if your team or installer plans to cut liners on site, or as fully fabricated parts cut to your tray dimensions if you send us a tray schedule or drawing. Fabricated parts are the more common order for larger installations since it removes on-site cutting from the installation timeline.