600–650°C
Materials · PD FELT
PBO Felt
PBO is the most heat-resistant fibre we use, rated 600°C, or 650°C with a premium grade, and stronger than aramid.
It is usually needled onto a Kevlar base; 3mm PBO + 7mm Kevlar is the standard build.
Used at the extrusion press exit and after the hot saw, where it replaces graphite.
Products
PBO Felt Belts, Sleeves & Pads
Every belt, sleeve, pad and blanket is made to your size. Open a product for its full specification.
Compare materials
PBO vs Kevlar vs Nomex
PBO sits at the top of the heat scale. Use it only where Kevlar is no longer enough.
Fibre
Poly-p-phenylene benzobisoxazole (PBO)
Para-aramid (aramid 1414)
Meta-aramid (aramid 1313)
Working temperature
600–650°C
480°C, max 500°C
260°C, max 280°C
Colour
Brown to golden
Yellow; green with 20% carbon
Off-white
Key property
Highest heat resistance; stronger than aramid
Very high tensile strength
Flame retardant; does not melt or drip
Typical density
400–480 g/m²·mm, needled on a Kevlar base
400–480 g/m²·mm
300–480 g/m²·mm
Main products
Belts, roller sleeves, pads, gloves
Belts, roller sleeves, pads, gloves
Belts, sleeves, pads, blankets, ironer felt
Relative cost
Highest
High
Medium
Best position
Press exit and hot saw
Run-out table, cooling bed levels 1–2
Cooling bed levels 3–4, textile blankets, oil-heated ironers
Temperatures are typical working limits for our felt; the real limit depends on contact time, load and thickness. Tell us where the part runs and we will confirm the grade.
600–650°C
Working temperature
3+7mm
Standard PBO/Kevlar build
18–350mm
Roller sleeve inner diameter
40m
Longest endless belt
Common applications
Where PBO felt works best
01
Aluminium press exit
Replaces graphite on the run-out table right after the press, where profiles are hottest.
02
Hot saw & run-out table
Roller sleeves and timing belts for the first positions after the hot saw.
03
Galvanized steel sheet
Para-aramid belts with a PBO option for sheet lines running at 500–600°C.
04
Operator protection
PBO gloves and mittens for handling hot profiles and tools.
Not sure which material?
Need PBO felt for your press exit?
Send the working temperature, the part size and a photo of the old label. Our engineers will recommend the grade and quote within one working day.