Specialty Films
Products
Specialty Films
High‑Performance Specialty Films for Advanced Capacitors
Polypropylene (PP) Film
Overview
E-TEK’s polypropylene films utilize proprietary PHCM (Polypropylene Heat-sealable Capacitor Material) technology, offering both-side sealable performance through precision heating and extension processes.
Key Benefits
Excellent thickness consistency30%+ improved thermal durability
Ideal for next-generation eco-friendly vehicles
Enhanced heat resistance and mechanical strength
Superior electrical characteristics
Both-side heat sealable
Available Thickness Range
Standard PP
2.3㎛ to 100㎛
Heat-Sealable
21.5㎛, 26.5㎛
(custom sizes available)
Base Material
SYC
premium grade
Core Dimensions
ID
38mm ±1 or 76mm ±1
OD
Order made to specification
Applications
Hybrid vehicle capacitors (HEV/PHEV)
Electric vehicle components (EV/FCEV)
Film capacitors
Motor applications
Power electronics
Technical Advantages
High-value materials for automotive industry
Proven performance in demanding thermal environments
Consistent quality for high-volume production
Custom slitting available
Technical Specification
PP Film (Base Film)
| Property | Specification |
|---|---|
| Available Thickness Range |
2.3μm ~ 2.8μm, 3.0μm, 3.5μm, 4.0μm, 5.0μm, 6.0μm, 7.0μm, 7.5μm, 8.0μm, 9.0μm, 10.0μm, 12.0μm, 15.0μm, 20.0μm, 25.0μm, 30μm ~ 100μm |
| Outer Diameter (OD) | Order made (according to customer requirement) |
| Inner Diameter (ID) | 38mm ±1 or 76mm ±1 |
| Base Material | SYC |
| Features | General PP film for capacitor use |
| Typical Purpose | Capacitor applications |
Heat Sealable PP Film
| Property | Specification |
|---|---|
| Type | Heat sealable capacitor film (PP) |
| Available Thickness |
8μm, 21.5μm, 26.5μm, Other thicknesses: order made |
| Inner Diameter (ID) | 38mm ±1 or 76mm ±1 |
| Base Material | SYC |
| Features | Heat sealable film for capacitor production |
| Typical Purpose | Capacitor applications (heat sealable) |
Polyester (PET) Film
Overview
SKC polyester films offer outstanding transparency, tensile strength, and electrical insulation properties. Nontoxic and tasteless with superior dielectric characteristics.
Key Benefits
High dielectric constant
Excellent electrical insulation
Superior tensile strength and stiffness
Outstanding durability
Highly transparent
Excellent dimensional stability
Available Thickness Range
Ultra-thin 1.4㎛, 1.9㎛
Standard 2.4㎛ to 36㎛
Heavy duty Up to 300㎛
Heat-Sealable 13.5㎛
Base Material
SKC
certified quality
Applications
Film capacitors
Motor insulation
Electronic component isolation
Power supply applicationsIndustrial electronics
Technical Specification
PET Film (Base Film)
| Property | Specification |
|---|---|
| Available Thickness Range | 1.4μm, 1.9μm 2.4μm, 2.7μm 3.0μm, 3.3μm, 3.5μm, 3.8μm 4.3μm, 4.6μm, 4.8μm 5.3μm, 5.6μm, 5.8μm 6.8μm, 7.8μm, 8.4μm, 8.5μm 9.8μm 11.3μm, 11.5μm, 11.8μm 12.0μm, 16.0μm 25.0μm, 36.0μm 36.0μm ~ 300μm (extended range) |
| Outer Diameter (OD) | Order made (according to customer requirement) |
| Inner Diameter (ID) | 38mm ±1 or 76mm ±1 |
| Base Material | SKC |
| Features | General purpose PET film for capacitor use |
| Typical Purpose | Capacitor applications |
Heat Sealable PET Film
| Property | Specification |
|---|---|
| Type | Heat sealable PET film for capacitors |
| Available Thickness | 13.5μm Other thicknesses: order made |
| Outer Diameter (OD) | Order made (according to customer requirement) |
| Inner Diameter (ID) | 38mm ±1 or 76mm ±1 |
| Base Material | SKC |
| Features | Heat sealable PET film for capacitor winding and sealing |
| Typical Purpose | Heat sealable capacitor applications |
Metalized Film (PP / PET)
Overview
Advanced metalized PP and PET films engineered for demanding capacitor applications. Available in multiple edge patterns and configurations to match your specific manufacturing requirements.
Applications
AC/DC film capacitors
Power electronics
Motor run capacitors
Lighting applications
Power factor correction
Technical Specification – Metalized Polyester Film (PET)
Thickness (2.4 ~ 16μm)
| Labeling | WMV (μm) | MMV (μm) | Tolerance |
|---|---|---|---|
| 3.5 | 3.5 | 3.7 | ±10% |
| 4.3 | 4.3 | 4.6 | ±10% |
| 4.6 | 4.6 | 4.9 | ±10% |
| 4.8 | 4.8 | 5.1 | ±10% |
| 5.3 | 5.3 | 5.6 | ±10% |
| 5.6 | 5.6 | 5.9 | ±10% |
| 5.8 | 5.8 | 6.1 | ±10% |
| 6.3 | 6.3 | 6.7 | ±10% |
| 6.8 | 6.8 | 7.2 | ±10% |
| 7.8 | 7.8 | 8.2 | ±10% |
| 8.5 | 8.5 | 8.9 | ±10% |
| 9.8 | 9.8 | 10.2 | ±10% |
| 11.5 | 11.5 | 12.0 | ±8% |
| 11.8 | 11.8 | 12.3 | ±8% |
Width / Margin / Diameter
| Width Tolerance | ±10% (기본) |
|---|---|
| Margin Width & Tolerance | below 20mm: ±0.2mm 21 < W < 35mm: ±0.3mm above 35mm: ±0.5mm |
| Outside Diameter | Film width above 10mm: Film width above 15mm: 180 +10 / -20mm |
| Core Inside Diameter | 75mm or 20mm |
Technical Specification – Metallized Polypropylene Film (PP)
Thickness (3.0 ~ 12μm)
| Labeling | MMV Thickness (μm) | Tolerance |
|---|---|---|
| 3.0 | 3.0 | ±10% |
| 4.0 | 4.0 | ±10% |
| 5.0 | 5.0 | ±10% |
| 6.0 | 6.0 | ±10% |
| 7.0 | 7.0 | ±10% |
| 7.5 | 7.5 | ±10% |
| 8.0 | 8.0 | ±10% |
| 9.0 | 9.0 | ±10% |
| 10.0 | 10.0 | ±8% |
| 11.0 | 11.0 | ±8% |
| 12.0 | 12.0 | ±8% |
Width / Margin / Diameter
| Width Tolerance | ±10% |
|---|---|
| Width & Tolerance (mm) | Width below 20mm: ±0.2mm |
| Margin Width & Tolerance | According to MMV design (standard capacitor margin) |
| Outside Diameter | Film width above 10mm: 160mm +10 / -10 |
| Core Inside Diameter | 21mm |
Edge Pattern Options
| Type | Description |
|---|---|
| Standard Type | Single-side metallized base film (PP, PET) with Al or Zn electrode. |
| Series Type | Two metallized sections on one base film for series-connected structures. |
| Heavy Edge Type | Thicker metallized edge area (single or double) for higher current handling. |
| Slope Type | Gradually changing metallized thickness along the film length. |
| Ramp Type | Step‑like change in metallized thickness for controlled current distribution. |
| AA Type | Active Al area with heavy‑edge Zn for improved contact and reliability. |
| Cutting Type | One‑side or both‑side wave cutting on the film edge. |
| Segment Type | Mosaic, circle, dot, T, TD segmented patterns for self‑healing design. |
