Quality Control: Our Zero-Defect Commitment to Metallized Film Manufacturing
At Taizhou Flyda Electronic, we believe that the reliability of a film capacitor starts with the microscopic integrity of its dielectric material. Our Quality Control (QC) system is integrated into every stage of the vacuum evaporation and slitting process, ensuring that every roll of MPP and MPET film meets the highest industrial standards.
1. Raw Material Inspection (BOPP/MPET Substrates)
The quality of the base film determines the final dielectric strength. We only source high-purity polypropylene and polyester resins.
Surface Roughness (μm): Controlled at 0.05 – 0.10 for optimal metal adhesion.
Thickness Uniformity: Verified across the entire 620mm master roll width to prevent hot spots in the final capacitor.
Mechanical Properties: Tensile strength and elongation tests ensure the film can withstand high-speed winding tensions.
2. In-Process Vacuum Coating Monitoring
During the vacuum evaporation of Zn-Al alloys, real-time monitoring is critical for electrical performance.
Square Resistance () Control: We utilize online resistance monitoring systems to ensure values (ranging from to 2.0 to 50.0) remain within 10% of the target specification.
Metal Layer Uniformity: Visual and sensor-based inspection for “pinholes” or uneven deposition that could compromise self-healing properties.
Margin Precision: Non-contact laser measurement ensures the blank insulating margin width is accurate to 0.2mm.
3. Post-Production Physical & Electrical Testing
Every batch of Flyda metallized film undergoes a final “Stress Test” before packaging.
Testing Item
Testing Standard
Typical Target
Dielectric Strength
IEC 60384-1
350V/ μm（DC at 23°C)
Dissipation Factor
1
-4 (for MPP)
Heat Shrinkage
120, 10
%(MD)
Self-healing Reliability
Internal Stress Test
Zero catastrophic breakdown
4. Precision Slitting & Clean-Room Packaging
The final step is as critical as the first. Our precision slitting units maintain a width tolerance of 0.1mm.
Anti-Static Treatment: All slitting is done with active static eliminators to prevent dust attraction.
Vacuum Packaging: To prevent oxidation of the Zinc/Aluminum layer, finished rolls are immediately vacuum-sealed in moisture-proof bags with desiccants.
