Description
6520 Fish Paper combines the dielectric strength and flexibility of traditional fish paper with the moisture-barrier and dimensional stability of polyester film. The material is produced by bonding a sheet of high-quality fish paper with a polyester film layer using an adhesive with good thermal and chemical resistance. The result is a robust, two-layer composite that provides reliable electrical insulation while maintaining workable form factors for winding insulation, coil insulation, transformer components, and other electrical assemblies.
Key properties at a glance
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Structure: Fish paper core + polyester film lamination
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Thickness range: 0.08 mm to 0.45 mm (customizable)
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Width options: 1000 mm standard; other widths available on request
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Color options: Green, Brown, Blue (custom colors available)
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Insulation class: Class E (120°C maximum operating temperature)
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Dielectric performance: High dielectric strength suitable for low- to mid-voltage insulation applications
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Mechanical properties: Flexible, tear-resistant, good foldability
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Moisture handling: Moisture resistance improved by polyester film layer
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Adhesive: Acid-free, high-temperature resistant (customizable)
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Safety/standards compatibility: Suitable for electrical insulation applications per common industry practice
Data table
| Indicator name | unit | value | |||||||||||
| 1 | Nominal thickness | mm | 0.15 | 0.17 | 0.2 | 0.22 | 0.25 | 0.27 | 0.3 | 0.35 | 0.5 | 0.6 | |
| 2 | Thickness deviation | mm | ±0.020 | ±0.020 | ±0.030 | ±0.030 | ±0.030 | ±0.030 | ±0.030 | ±0.035 | ±0.05 | ±0.060 | |
| 3 | Standard quantification and deviation | g/m2 | 190±28 | 215±32 | 250±38 | 275±40 | 310±45 | 330±50 | 370±55 | 490±73 | 570±90 | 730±110 | |
| 4 | Nominal film thickness | μm | 50 | ||||||||||
| 5 | Tensile Strength | No Bonding at Portrait | N/10Mm | ≥100 | ≥110 | ≥125 | ≥130 | ≥150 | ≥175 | ≥200 | ≥240 | ≥360 | ≥400 |
| After bending at Portrait | ≥70 | ≥75 | ≥80 | ≥85 | ≥95 | ≥100 | ≥110 | ≥180 | ≥275 | ≥320 | |||
| NoBonding at Transverse | ≥80 | ≥85 | ≥90 | ≥90 | ≥95 | ≥100 | ≥105 | ≥120 | ≥180 | ≥200 | |||
| After bending at Transverset | ≥50 | ≥50 | ≥50 | ≥55 | ≥60 | ≥70 | ≥80 | ≥115 | ≥175 | ≥190 | |||
| 6 | Elongation | No Bonding at Portrait | % | ≥2 | ≥3 | ||||||||
| After bending at Transverset | ≥8 | ≥10 | |||||||||||
| 7 | Breakdown Voltage | No Bending | kV | ≥8.0 | |||||||||
| After bending | ≥6.0 | ||||||||||||
| 8 | Normal Bond Strength | / | No layering | ||||||||||
| 9 | Heat State Bond Strength130±2℃ 10min | / | No layering, no foaming, no glue flow | ||||||||||
Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.
Application scenarios
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Electrical motor windings and stator insulation
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Transformer components and coil insulation
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Electrical enclosures and housing liners requiring moisture resistance
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Cable and wire insulation under moderate temperature environments
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Magnetic devices and inductors where flexible insulation is beneficial
FAQs
Q1: What is Fish Paper/6520 used for?
A1: It is used as electrical insulation in devices and components where flexibility, moderate temperature tolerance, and moisture resistance are beneficial.
Q2: Can I customize thickness and width?
A2: Yes. Thickness and width are customizable to fit design requirements, with standard thickness ranges and a standard 1000 mm width.
Q3: What temperatures can 6520 withstand?
A3: Continuous operation up to Class E rating, typically around 120°C; consult the adhesive and lamination specs for exact limits under duty conditions.
Q4: What colors are available?
A4: Common options are Green, Brown, and Blue, with additional colors available on request.
Q5: How is the material manufactured?
A5: Fish paper is bonded to a polyester film with a high-temperature, acid-free adhesive to form a two-layer composite.
Testing standards and quality notes
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Dielectric strength and electrical insulation performance should be verified according to relevant industry standards for film-backed insulation papers (specify local/region standards if applicable).
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Thermal aging tests can validate performance at elevated temperatures up to the rated class temperature (120°C).
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Mechanical tests for tear resistance and flexibility should follow standard sheet/laminate test methods.
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Moisture resistance can be assessed with controlled humidity and conditioning cycles to simulate real-world environments.
Note: You should align testing protocols to your internal QA lab capabilities and any local regulatory standards. Include test certificates with shipments when available.