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Phlogopite mica tape is built on phlogopite mica paper as the base, reinforced on one or both sides with alkali-free glass fibre cloth or polymer film (such as PE), bonded with silicone resin, then high-temperature baked, dried and slit to finished rolls. The tape is wrapped between the conductor core and the outer sheath of fire-resistant cables, keeping the circuit live while the fire is still burning.
Where calcined muscovite is the cost-optimised workhorse, phlogopite is the choice when the cable has to survive 750–850 ℃ for 90 minutes without breakdown, and it holds up well in high-humidity and chemically aggressive environments.
The mica layer is the dielectric core. Phlogopite keeps its insulation at 750–850 ℃ for the full 90-minute fire window, and mica content runs >60% to >70% depending on the grade and thickness.
Reinforcement on one or both faces carries the tensile load. Choose GS / GD for glass only, GFD for glass plus film, or FS for film only — each combination targets a different wrapping line and cable design.
Bonded with silicone resin and baked at high temperature. The bond resists acid and alkali, ages slowly, and releases no toxic gas under high temperature — a requirement in tunnels, ships and enclosed public buildings.
Single-sided alkali-free glass cloth. The most widely ordered phlogopite grade. 0.08–0.15 mm thick, breakdown voltage >1.0 to >2.0 kV, tensile strength ≥150 to ≥200 N/15mm.
Single-sided PE film. Film carries a very high dielectric strength of >5.5 kV at both 0.10 mm and 0.14 mm, suited for thin-wall cable constructions where glass cannot be used.
Glass cloth on both faces. Higher thickness bands (0.14 / 0.16 / 0.20 mm) and higher binder content for heavy-duty fire wraps. Breakdown voltage up to >2.5 kV.
Glass and PE film on each side. Combines the mechanical strength of glass with the dielectric performance of film. Breakdown voltage >3.5 kV across 0.12 / 0.14 / 0.16 mm.
Product code: R-5461 = Rongtai product serial number · P = Phlogopite · GS = glass on single side · GD = glass on both sides · GFD = glass and film on each side · FS = film on single side.
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| Item | Unit | 0.08 mm | 0.10 mm | 0.11 mm | 0.12 mm | 0.13 mm | 0.14 mm | 0.15 mm |
|---|---|---|---|---|---|---|---|---|
| Appearance | — | No alien material, no split, no scar or hole, no broken fold | ||||||
| Length | m | 500 / 1000 / 2000 | ||||||
| Thickness | mm | 0.08±0.015 | 0.10±0.015 | 0.11±0.015 | 0.12±0.015 | 0.13±0.015 | 0.14±0.015 | 0.15±0.015 |
| Weight of tape | g/m² | 110±10 | 135±10 | 145±10 | 165±15 | 180±15 | 205±15 | 215±15 |
| Mica content | % | >60 | ≥60 | >65 | >65 | >70 | ≥70 | >70 |
| Binder content | % | 13±3 | 13±3 | 13±3 | 13±3 | 13±3 | 13±3 | 13±3 |
| Breakdown voltage | kV | >1.0 | ≥1.1 | >1.3 | >1.5 | >1.7 | ≥1.8 | >2.0 |
| Tensile strength | N/15mm | ≥150 | ≥160 | ≥180 | ≥200 | ≥200 | ≥200 | ≥200 |
| Fire grades | ℃ | 750 ℃–850 ℃, IEC 60331 | ||||||
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| Item | Unit | 0.10 mm | 0.14 mm |
|---|---|---|---|
| Appearance | — | No alien material, no split, no scar or hole, no broken fold | |
| Length | m | 500 / 1000 / 2000 | |
| Thickness | mm | 0.10±0.015 | 0.14±0.015 |
| Weight of tape | g/m² | 159±10 | 202±10 |
| Mica content | g/m² | 120±5 | 160±5 |
| Binder content | g/m² | 14±3 | 17±3 |
| Breakdown voltage | kV | >5.5 | >5.5 |
| Tensile strength | N/15mm | >100 | >100 |
| Fire grades | ℃ | 750 ℃–850 ℃, IEC 60331 | |
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| Item | Unit | 0.14 mm | 0.16 mm | 0.20 mm |
|---|---|---|---|---|
| Appearance | — | No alien material, no split, no scar or hole, no broken fold | ||
| Length | m | 500 / 1000 / 2000 | ||
| Thickness | mm | 0.14±0.02 | 0.16±0.02 | 0.20±0.02 |
| Weight of tape | g/m² | 194±12 | 228±13 | 260±14 |
| Mica content | g/m² | 120±5 | 150±5 | 180±5 |
| Binder content | g/m² | 28±3 | 32±4 | 34±5 |
| Breakdown voltage | kV | >1.5 | >1.8 | >2.5 |
| Tensile strength | N/15mm | >120 | >120 | >120 |
| Fire grades | ℃ | 750 ℃–850 ℃, IEC 60331 | ||
Swipe horizontally to see all columns →
| Item | Unit | 0.12 mm | 0.14 mm | 0.16 mm |
|---|---|---|---|---|
| Appearance | — | No alien material, no split, no scar or hole, no broken fold | ||
| Length | m | 500 / 1000 / 2000 | ||
| Thickness | mm | 0.12±0.02 | 0.14±0.02 | 0.16±0.02 |
| Weight of tape | g/m² | 179±13 | 216±13 | 221±13 |
| Mica content | g/m² | 120±5 | 145±5 | 160±5 |
| Glass content | g/m² | 23±2 | 28±2 | 23±2 |
| Film content | g/m² | 18±3 | 23±3 | 18±3 |
| Binder content | g/m² | 18±3 | 20±3 | 20±3 |
| Breakdown voltage | kV | >3.5 | >3.5 | >3.5 |
| Tensile strength | N/15mm | >120 | >120 | >120 |
| Fire grades | ℃ | 750 ℃–850 ℃, IEC 60331 | ||
Standard cores: 52 mm, 54 mm, 76 mm, 120 mm. Custom slitting widths and core sizes are produced to drawing. Packaging: cardboard boxes or wooden boxes. Storage in a dry room-temperature environment; shelf life at least 1 year.
No breakdown for 90 minutes at 750–850 ℃ and 600–1000 V, meeting IEC 60331 and the fire-resistant cable specifications written around it.
Breakdown voltage climbs with thickness — from >1.0 kV at 0.08 mm to >2.0 kV at 0.15 mm on GS, and >5.5 kV on FS at both thicknesses.
GS grade runs ≥150 to ≥200 N/15mm across the thickness range — enough to survive high-speed wrapping around tight conductor cores without tearing.
Excellent resistance to acid and alkali with strong ageing resistance. In a dry, room-temperature store the tape keeps its properties for at least one year.
No toxic components in the formulation and no toxic gas released at high temperature — important for tunnels, ships and enclosed public buildings.
GS, GD, GFD and FS cover glass-only, glass-both-sides, glass-plus-film, and film-only constructions, all from the same R-5461-P family.
Both use mica paper as the base. Phlogopite mica paper keeps its insulation at 750–850 ℃ for the full 90-minute fire window and is the preferred grade for high-humidity and chemically aggressive environments. Calcined muscovite is a cost-optimised alternative for volume cable production. See Calcined Mica Tape for the cost-focused option.
Choose GS for the most widely used single-glass construction, GD for heavy-duty double-glass wrapping, GFD when both mechanical strength and high dielectric strength are needed, and FS for thin-wall cable designs that require >5.5 kV breakdown voltage without glass cloth.
Thickness runs from 0.08 mm to 0.20 mm depending on grade. Slitting width runs from 4.5 mm to 1000 mm. Standard roll lengths are 500 m, 1000 m and 2000 m on 52 mm, 54 mm, 76 mm or 120 mm cores.
IEC 60331 and 750 ℃–850 ℃ for the full 90-minute fire window. The GS, FS, GD and GFD grades all carry the same fire rating; the difference is reinforcement type, thickness band and dielectric performance.
Tell us your grade (GS / GD / GFD / FS), thickness, width, roll length and target fire standard. Kaxite will confirm the R-5461-P specification, lead time and price for your cable line.
Address
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China
0086-574-87527773
No 432 Zhenhai Middle Road, Luotuo Street, Zhenhai District, Ningbo City, Zhejiang China