Single Margin Zn-Al MPP Film (High Resistance)

High Resistance (15-50 Ohm) Zn-Al Metallized Polypropylene Film with Single Margin for Self-healing Capacitors.
High-Rs Zn-Al MPP Film optimized for rapid self-healing and minimal capacitance drift.

Single Margin Zn-Al MPP Film (High Resistance)

In a high vacuum condition, a coating machine melts, evaporates, and deposits high-purity zinc and aluminum on the base film. Following the formation of an incredibly thin metal layer, a metalized polypropylene film is created on the surface.
The metalized film has a self-healing function, and it naturally reverts to the electrical performance characteristic prior to the breakdown right after the partial breakdown of the film dielectric. The metalized film is covered on one or both sides of the edge or in the center to create a blank insulating strip without evaporating metal, which is known as the margin. The margin’s width is also known as the margin.

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Basic Specification

Base filmPolypropylene film
Normal thickness2.0μm ~12.0μm
Margin typeSingle
Coating metalAluminum or Zinc-Aluminum alloy
Coating sideSingle
Edge structureHeavy edge

Square Resistance

Reinforced resistanceNormal resistance
(2～4)Ω/□(30～555)Ω/□
(2～4)Ω/□(40～65)Ω/□
(1～3)Ω/□(50～80)Ω/□
(2～4)Ω/□(70～100)Ω/□
(2～4)Ω/□(90～120)Ω/□

Normal film Width and Margin

Width (mm)Margin (mm)Width (mm)Margin (mm)
37.52.0/2.5902.0/2.5
502.0/2.5952.0
552.0/2.51002.5
602.0/2.51102.5
67.52.01152.5
752.0/2.5

Note: If you need other resistance, film width or margin, please send us information, thank you.

Inside/Outside Core Diameter

Inside core diameter ToleranceOutside core diameteTolerance
75mm+1/-0.5mm220mm±20mm
75mm+1/-0.5mm280mm±20mm
75mm+1/-0.5mm320mm±20mm

Note: A pair tolerance of outside core diameter <=2mm

Specifications of Metallized Polypropylene Film

PropertiesUnitTypical value
Densityg/cm30.905±0.005
Thicknessµm2.0 ～ 12
Tensile StrengthMD (MPa)≥100
Elongation at BreakMD (%)20～200
Elastic ModulusMD (MPa)2800
Heat ShrinkageMD (%)≤5 ( 120°C, 10min)
Wetting TensionmN/m38  (Corona treated side)
Surface Roughnessµm0.08
Melting Point℃172
Volume ResistivityΩ.m＞1015
Break-down VoltageV/µm≥350 ( 23°C, DC )
Dielectric Constant2.2  (20℃，1KHz)
Dissipation Factor≤4×10-4 (20℃，1KHz )
RCΩF≥5×104