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Polypropylene plain film, 2 um–12 um, serves as the foundation for MPP films. 620mm is the typical width.
A coating machine in a high vacuum state melts, evaporates, and deposits high-purity zinc and aluminum on the base film, resulting in the formation of a metalized polypropylene film with a very thin metal layer on its surface.
Following a partial breakdown of the thin film dielectric, metallization has a self-healing action that causes it to automatically resume its electrical performance prior to the breakdown. Covering one or both of the metalized film's edges or the center in order to create a blank insulating tape without evaporating metal is known as the margin, and its width is known as the margin.
Base film | Polypropylene film |
Normal thickness | 2.0μm ~12.0μm |
Margin type | Single |
Coating metal | Aluminum or Zinc-Aluminum alloy |
Coating side | Single |
Edge structure | Heavy edge |
Reinforced resistance | Normal resistance |
(2～4)Ω/ohms | (6～9)Ω/ohms |
(1～3)Ω/ohms | (4～6)Ω/ohms |
(1～3)Ω/ohms | (12～18)Ω/ohms |
(2～4)Ω/ohms | (17～23)Ω/ohms |
(2～4)Ω/ohms | (9～30)Ω/ohms |
Width (mm) | Margin (mm) | Width (mm) | Margin (mm) | Width (mm) | Margin (mm) |
7 | 0.5/1.5 | 37.5 | 2.0/2.5 | 70 | 2.5 |
9 | 1.5 | 40 | 2.5 | 75 | 2.0/2.5 |
10 | 1.1/1.5 | 42.5 | 2.5 | 80 | 2.5 |
14 | 1.0 | 43 | 2.0 | 85 | 2.5 |
19 | 1.5 | 45 | 2.0 | 90 | 2.0/2.5 |
21 | 1.5/2.0 | 50 | 2.0/2.5 | 95 | 2.5 |
25 | 2.5 | 55 | 2.5 | 100 | 2.0/2.5 |
26 | 1.5/2.0 | 60 | 2.0/2.5 | 110 | 2.5 |
30 | 2.0/2.5 | 62.5 | 2.5 | 120 | 2.0 |
35 | 2.5 | 65 | 2.5 | 125 | 2.0/2.5/5 |
Note: If you need other resistance, film width or margin, please send us information, thank you.
Inside core diameter/ Tolerance | Outside core diameter/Tolerance | ||
75mm | +1/-0.5mm | 180mm | +-25mm |
240mm | +-20mm | ||
280mm | +-20mm | ||
320mm | +-20mm | ||
Note: A pair tolerance of outside core diameter <=2mm | |||
Properties | Unit | Typical value |
Density | g/cm3 | 0.905±0.005 |
Thickness | µm | 2.0 ～ 12 |
Tensile Strength | MD (MPa) | ≥100 |
Elongation at Break | MD (%) | 20～200 |
Elastic Modulus | MD (MPa) | 2800 |
Heat Shrinkage | MD (%) | ≤5 ( 120°C, 10min) |
Wetting Tension | mN/m | 38 (Corona treated side) |
Surface Roughness | µm | 0.08 |
Melting Point | ℃ | 172 |
Volume Resistivity | Ω.m | ＞1015 |
Break-down Voltage | V/µm | ≥350 ( 23°C, DC ) |
Dielectric Constant | 2.2 (20℃，1KHz) | |
Dissipation Factor | ≤4×10-4 (20℃，1KHz ) | |
RC | ΩF | ≥5×104 |
Film rolls are packed in plastic bags, vacuumed, and put into desiccant for heat sealing.
The Bags are marked with type labels, mark thickness width, free margin width and resistance.
The bags are packed in carton cases.
The cartons are wrapped in wooden cases or reinforced cartons.
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