Continental Trade Sp. z o. o.

Micanite

Tapes

Mica tape is made of mica paper (natural phlogopite, calcined muscovite or synthetic mica) glued special resin to the substrate of glass fiber or polyethylene. To bond mica paper to the substrate epoxy or silicone resins are most commonly used. For this reason they are also called micanite tapes.

Typically, the tape is produced with a thickness of 0.08 mm to 0.15 mm and widths depending on the needs of the customer (in the range of 4.5 mm to 1 000 mm).

The thicker tapes, i.e. with a thickness of 0.2 mm to 0.8 mm, called mica rolls, are produced in a standard width of 1 000 mm and lengths from 20 m to 50 m. They are made using a phlogopite mica paper and thus can operate at temperatures up to 800 °C. They are characterized by very high dielectric resistance (breakdown voltage > 10 kV / mm). R-5461-P-Rx rolls are based on phlogopite mica paper reinforced by glass cloth or harmless ceramic fiber (according to customers’ requirement). Mica rolls are described here.

Properties:

  • high thermal resistance - good fire resistance,
  • non-flammable, does not contain asbestos, does not produce toxic gases,
  • very good resistance to electrical breakdown and corona discharge,
  • excellent tensile strength, anti-shock.

Factors determining the properties of mica rolls:

  • kind of mica paper,
  • type and amount of binder used (resin),
  • type of applied substrate (fiber glass, ceramic, plastic film)
  • number of substrate layers.

Applications:

  • insulation of electrical cables and coils
  • multi-storey buildings,
  • power stations,
  • industry plants,
  • subways,
  • computer centers,
  • aerospace units,
  • telecommunication centers,
  • ships,
  • military facilities.
Mica tapes in electric machines

There are the following types of mica tapes:

  • based on phlogopite, resistance up to 840°C
  • based on calcined muscovite, resistance up to 900°C
  • based on synthetic mica, resistance up to 1000°C

Depending on the material of substrate and the number of layers of the substrate in each of the above types can be distinguished many kinds of tapes.

Depending on the amount of binder used is also mentioned tapes heavily - , medium - , less -  glued, which also does another division into subspecies tapes. 

The basic family of tapes, called R5461, is discussed below.

 

TypeNameMica
paper
Support
R-5461-P-GS Single side reinforce phlogopite mica tape with glass fiber cloth Phlogopite  Fiber glass
R-5461-P-GD Double side reinforce phlogopite mica tape with glass fiber cloth Phlogopite  Fiber glass
(double)
R-5461-P-GFD Double side reinforce phlogopite mica tape with glass fiber cloth and polyethylene film Phlogopite  Fiber glass and polyethylene film
R-5461-P-FS Single side reinforce phlogopite mica tape with PE film Phlogopite  Polyethylene film
R-5461-S-GS Single side synthetic mica tape with glass fiber cloth Synthetic  Fiber glass
R-5461-S-GD Double side synthetic mica tape with glass fiber cloth Synthetic  Fiber glass
(double)
R-5461-S-GFD Double side reinforce synthetic mica tape with glass fiber cloth and polyethylene film Synthetic  Fiber glass and 
polyethylene film
R-5461-CM-GS Single side calcined muscovite mica tape with glass fiber cloth Calcined
muscovite
Fiber glass

Encoding:

Mica paper:
P
- phlogopite
S- synthetic
CM - calcined muscovite 
Substrate:
G
- fiberglass cloth
F- polyethylene film 
Layers:
S
-  single side bonded
D- double side bonded
Tapes R-5461-P-GS

Specifications:

Item  Unit TYPE : R-5461-P-GS
0,08mm 0,10mm 0,11mm 0,12mm 0,13mm 0,14mm 0,15mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 500, 1 000,  2 000
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 [g/m2] 105 ± 10 130 ± 10 145 ± 10 170 ± 15 180 ± 15 215 ± 15 225 ± 15
Content of mica [%] >55 ≥60 >63 >65 >70 ≥70 >70
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
Binder content [%] 13 ± 3 13 ± 3 13 ± 3 13 ± 3 13 ± 3 13 ± 3 13 ± 3
Thermal resistance [℃] 750 ℃ - 840 ℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 500 m, 1 000 m, 2 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition. 
Tapes R-5461-P-GD

Specifications:

Item   Unit TYPE : R-5461-P-GD
0,14 mm 0,16mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 200, 500, 1000
Thickness [mm] 0,14 ± 0,015 0,16 ± 0,015
Weight [g/m2] 200 ± 15 220 ± 15
Content of mica [%] >60 ≥60
Breakdown voltage [kV] >1.5 ≥1.5
Tensile strength [N/15mm] ≥200 ≥200
Binder content [%] 10 ± 3 10 ± 3
Thermal resistance [℃] 750 ℃ - 840 ℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 500 m, 1 000 m, 2 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Tapes R-5461-P-GDF

Specifications:

Item Unit TYPE: R-5461-P-GFD
0,14 mm 0,16mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 200, 500, 1 000
Thickness [mm] 0,14 ± 0,015 0,16 ± 0,015
Weight [g/m2] 200 ± 15 220 ± 15
Content of mica [%] >60 ≥60
Breakdown voltage [kV] >3.5 ≥3.5
Tensile strength [N/15mm] ≥200 ≥200
Binder content [%] 10 ± 3 10 ± 3
Thermal resistance [℃] 750 ℃ - 840 ℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 200 m, 500 m, 1 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Tapes R-5461-P-FS

Specifications:

Item Unit TYPE: R-5461-P-FS
0,10mm 0,11mm 0,12mm 0,13mm 0,14mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 500, 1 000, 2 000
Thickness [mm] 0,10 ±0,015 0,11±0,015 0,12±0,015 0,13±0,015 0,14±0,015
Weight [g/m2] 135 ± 10 160 ± 10 170 ± 15 205 ± 15 215 ± 15
Content of mica [%] ≥65 >70 >75 >75 ≥75
Breakdown voltage [kV] ≥5.1 >5.0 >5.0 >5.0 ≥5.0
Tensile strength [N/15mm] ≥130 130 130 130 130
Binder content [%] 13 ± 3 13 ± 3 13 ± 3 13 ± 3 13 ± 3
Thermal resistance [℃] 750 ℃ - 840 ℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 500 m, 1 000 m, 2 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Tapes R-5461-S-GS

Specifications:

Item   Unit TYPE: R-5461-S-GS
0,10mm 0,11mm 0,12mm 0,13mm 0,14mm 0,15mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 500, 1 000, 2 000
Thickness [mm] 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 [g/m2] 125 ±10 140 ±10 160 ±15 170 ±15 205 ±15 215 ±15
Content of mica [%] ≥60 >65 >65 >65 ≥70 >70
Breakdown voltage [kV] ≥1.0 >1.2 >1.4 >1.6 ≥1.7 >1,9
Tensile strength [N/15mm] ≥160 ≥180 ≥200 ≥200 ≥200 ≥200
Binder content [%] 13 ± 3 13 ± 3 13 ± 3 13 ± 3 13 ± 3 13 ± 3
Thermal resistance [℃] 950℃ - 1000℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 500 m, 1 000 m, 2 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Tapes R-5461-S-GD

Specifications:

Item   Unit TYPE: R-5461-S-GD
0,14 mm 0,16mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 200, 500, 1 000
Thickness [mm] 0,14 ± 0,015 0,16 ± 0,015
Weight [g/m2] 200 ± 15 220 ± 15
Content of mica [%] >60 ≥60
Breakdown voltage [kV] >1.0 ≥1,0
Tensile strength [N/15mm] ≥160 ≥160
Binder content [%] 10 ± 3 10 ± 3
Thermal resistance [℃] 950 ℃ - 1000℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 200m, 500 m, 1 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Tapes R-5461-S-GFD

Specifications:

Item  Unit TYPE: R-5461-S-GFD
0,14 mm 0,16mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 200, 500, 1 000
Thickness [mm] 0,14 ± 0,015 0,16 ± 0,015
Weight [g/m2] 200 ± 15 220 ± 15
Content of mica [%] >60 ≥60
Breakdown voltage [kV] >3.5 ≥3,5
Tensile strength [N/15mm] ≥160 ≥160
Binder content [%] 10 ± 3 10 ± 3
Thermal resistance [℃] 950 ℃ - 1000℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 200 m, 500 m, 1 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Tapes R-5461-CM-GS

Specifications:

Item  Unit TYPE: R-5461-CM-GS
0,12 mm 0,13mm 0,14 mm
Appearance   No impurities, no tears, no holes, no bumps, no folds
Length [m] 500, 1 000, 2 000
Thickness [mm] 0,12 ± 0,015 0,13 ± 0,015 0,14 ± 0,015
Weight [g/m2] 125 ± 15 145 ± 15 170 ± 15
Content of mica [%] > 55 > 60 > 60
Breakdown voltage [kV] > 1,8 > 2,2 >2,2
Tensile strength [N/15mm] ≥ 150 ≥ 150 ≥ 150
Binder content [%] 20 ± 3 20 ± 3 20 ± 3
Thermal resistance [℃] 900 ℃ - 1000℃, IEC331

Dimensions:

  • width: 4,5 mm - 1 000 mm
  • length: 500 m, 1 000 m, 2 000 m
  • roll core diameter: 52mm, 54mm, 76mm or 120mm

Storage:

  • minimum 12 months, if stored at ambient temperature of 20ºC ± 5ºC in dry condition.
Types of substrates
Knowledge of uses

When using fire-resistant mica tape, the winding and wrapping processes are most critical. The technicians should select appropriate width mica tape based on the wire sizes, winding tension, angles and wrapping speed, in case of broken tape or missed space, to ensure the surface of the insulated conductors after wrapping is smooth and flat, no mica falling off.

When winding small cross section wires, due to small coiling radius, the mica falls off easily. The width of the mica tape is small and the tensile strength is small, so the coiling tension and speed shall be uniform, in case tape broken and mica powder fallen off.

Mica tape wrapping layers and lapping rate are different when the material properties, specifications and models of the cables are different, and shall be determined by the cable designer based on the result of fire resistance test. According to IEC standard about fire-resistant cable testing, we recommend wrapping layers are 2 and the lapping rate is not less than 50%, i.e. the wire is wrapped by 4 layers of mica tapes.

While every attempt has been made to verify the source of the information, no responsibility is accepted for accuracy of data.

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