Nomex®
'Man made' meta-aramid fibre based cover material suited to high temperature embossing.
Typical Uses
- High temperature embossing
Key Features
- Withstands high temperature embossing conditions
- Enables high production speeds
- Good marking resistance due to high modulus of elasticity
- Increased productivity through greatly extended grinding intervals
Nomex® is a man-made fibre based roll cover material suited to high temperature embossing applications. Outstanding temperature resistance, along with excellent resistance to surface damage and high nip loads ensures minimum maintenance and a very long service life.
DuPont Approved
“DuPont certify that they consider RHL to be fully technically capable to manufacture filled rolls with Nomex®. We therefore recommend this company as an excellent source for long lasting Nomex® calender rolls.”
DuPont de Nemours Int. SA, Geneva, Switzerland
Construction
Nomex® is a ‘man-made’ fibre based material. The material has a rigid and regular (meta-aramid) molecular structure. Because of the strong structural linkages, Nomex fibres are both chemically and thermally very stable and will not flow or melt even above 350°C. For this reason Nomex is suited to high temperature embossing where alternative backing roll materials would quickly break down.
This unique constuction also gives Nomex® excellent marking resistance. Marking resistance and recovery are closely related to Modulus of Elasticity (the ability of the material to rebound to its original shape after being dented). The Nomex® structure has a high modulus of elasticity, which is maintained at elevated temperatures.
Operational Benefits
- Outstanding temperature resistance (enabling the heated steel roll to be run up to 360°C)
- Excellent mark resistance due to high modulus of elasticity
- Outstanding service life, leading to lower operating costs
- Nomex can withstand high nip loads up to 450kN/m
Quality Benefits
- Enables high temperature processes
- Precise emboss
- Minimal dusting avoids contamination
RHL produce complete new Nomex® rolls or can refill existing filled rolls with Nomex® material. Nomex can be resurfaced using standard equipment such as diamond tool, abrasive belt or stone grinding.
Performance
| Typical Material Hardness | Max. Speed | Max. Linear Pressure | Max. Roll Surface Temp.* | |
|---|---|---|---|---|
| Nomex® | 87±1°Shore D | 1000m/min | 450kN/m | 160°C |
