Product Overview
Mica band heaters wind resistance wire on a mica frame, sandwich it between mica sheets, and clad it in stainless steel or galvanized plate—only 3–5 mm thick. The thin profile gives faster thermal response and easier fit on small-diameter barrels and pipes.
Mica temperature limit is around 350°C; beyond that it delaminates and insulation drops, so these heaters are not for high-temperature engineering plastics. They are fully adequate for PE, PP, ABS, and similar common resins, and cost less than ceramic types.
Bands come as split, two-piece, or seamless; split is easiest to install. ID tolerance is held within −0.5 mm to ensure barrel contact—too large a gap raises the heater own temperature and causes early failure. Leads can be fitted with stainless braided sleeves against field abrasion.
Construction Features
- 3 – 5 mm thick, fast thermal response
- Mica insulation, up to 350°C
- ID tolerance −0.5 mm, close barrel fit reduces contact resistance
- Split, two-piece, and seamless constructions
- Lower cost than ceramic, for low/medium-temperature service
- Optional stainless braided lead sleeve
Technical Specifications
| Rated Power | 0.2 – 8 kW |
|---|---|
| Rated Voltage | 220V / 380V |
| Max Temperature | 350°C |
| ID Range | Φ25 – Φ500 mm |
| Band Width | 20 – 150 mm |
| Thickness | 3 – 5 mm |
| Shell Material | 304 stainless steel / galvanized plate |
| Insulation Resistance | ≥ 100 MΩ |
The table lists typical configuration ranges. Special pressure, temperature or media conditions require re-checking; final parameters are confirmed by the approved drawings and technical agreement.
Typical Applications
- Small injection barrels
- Extruder low-temperature zones
- Pipe wrap heating
- Blow-molding machine heating
- Laboratory equipment
Information Needed for Selection
- Medium name, concentration, and whether it contains particles
- Total medium volume or circulation flow rate
- Initial and target temperature
- Required heat-up time
- Vessel or pipe size and material
- Supply voltage, phases, and available capacity
- Installation environment and hazardous-area requirements
- Connection standard and mounting orientation
