Frame sealing tape for crystalline silicon solar cell modules
1Key Takeaways
This standard specifies the terms and definitions, technical requirements, test methods, inspection rules, packaging, marking, transportation and storage of frame-sealing tape for crystalline silicon solar cell modules (hereinafter referred to as frame-sealing tape). This standard applies to frame-sealing tape for crys…
2Expert Interpretation
Professional interpretation of the technical requirements of NB/T 10453-2020 standard for frame sealing tape for crystalline silicon solar cell modules, including material performance indicators, test methods and quality control points, covering 13 key parameters such as thickness tolerance, electrical strength, weather resistance, etc., providing standardized solutions for photovoltaic module sealing systems.
Analysis of the core content of the standard
| Performance indicators | Initial requirements | Requirements after aging | Test standards |
|---|---|---|---|
| Tensile strength (longitudinal) | ≥1.0MPa | ≥0.7MPa | GB/T 20631.2 |
| 180° peel strength | ≥0.6N/mm | ≥0.6N/mm | GB/T 2792 |
| Water vapor transmission rate | ≤15g/(㎡·d) | ≤15g/(㎡·d) | GB/T 26253 |
Material properties and technological evolution
Sealing tape is composed of a foamed polyolefin substrate and an adhesive layer. Its technological development has gone through three stages: initial pure sealing function → mid-term buffer sealing composite → current electrical insulation integration. This standard includes volume resistivity (≥1.0×10⁷Ω·m) and electrical strength (≥7.0MV/m) as mandatory indicators for the first time.
Key test methods
Wet heat aging test case: After testing for 1000 hours at 85℃/85%RH, the tape must maintain 100% of the initial peel strength, which is higher than the 80% retention rate requirement of the similar international standard IEC 61215-2.
Implementation Suggestions
- Raw Material Selection: Prioritize substrates that have passed 200 hot and cold cycles (-40℃~85℃) verification
- Process Control: The pressing process must ensure that the rolling speed is 10-12s/200mm, twice on the front and back
- Quality Monitoring: It is recommended to add infrared spectroscopy to monitor the aging degree of the adhesive layer
Comparison Analysis of Standards
| Comparison Dimensions | NB/T 10453 | IEC 61215 | UL 746C |
|---|---|---|---|
| Electrical Performance | Dual Indicators | Volume Resistivity Only | Arc resistance |
| Aging cycle | 1000h | 1000h | 2000h |
| Mechanical retention rate | 100% | 80% | 75% |