GB/T 45921-2025 in English
VALIDOrganic-electrochromic laminated glass used in buildings
- Issued on:2025-06-30
- Implemented on:2026-01-01
- File Format:PDF
- Delivery:Via email within 5 business days
Price(USD)：
$435.00
$422.00
$422.00
| Standard No: | GB/T 45921-2025 |
| Document status: | VALID |
| Title in English: | Organic-electrochromic laminated glass used in buildings |
| Title in Chinese: | 建筑用有机电致变色夹层玻璃 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2025-06-30 |
| Implemented on: | 2026-01-01 |
| ICS Classification: | 81.040.30-Glass products |
| Chinese Classification: | Q33-Building glass |
| Professional Classification: | GB-National Standard |
| Related Topics: | discoloration
Electrochromic colored glass mirror Colored Glass Specifications electrochromic camouflage Plexiglas execution |
《GB/T 45921-2025建筑用有机电致变色夹层玻璃》由TC255（全国建筑用玻璃标准化技术委员会）归口，主管部门为中国建筑材料联合会。
Introduction
Interpretation of the core content of the standard
| Technical Dimensions | Fading State Requirements | Coloring State Requirements | Test Methods |
|---|---|---|---|
| Visible Light Transmittance | ±5% Deviation | ±2% Deviation | GB/T 2680 Spectrometry |
| Total Solar Transmittance | ±5% Deviation | ≤40% Limit | 5-Point Uniformity Test |
| UV Blocking | ≤1% Uniform Requirements | Wavelength 280-380nm | |
Key Technical Indicators
The standard defines 7 core performance parameters for organic electrochromic film:
- Brightness-darkness contrast ratio ≥5 (actual value can reach 8-15)
- Switching time ≤400s (products below 2㎡)
- Color difference ΔEab*≤3 (CIELAB color space)
- Power limit: operating ≤5W, maintenance ≤1W
Durability test system
The standard establishes three-dimensional aging test:
- Temperature and humidity cycle: 85℃/1000h→50℃95%RH/336h→-20℃/336h
- Irradiation test: 2000h UV irradiation (45±5℃)
- Mechanical fatigue: 40,000 light-dark switching cycles
Permitted performance degradation: transmittance change ≤5% (temperature and humidity test), ≤3% (irradiation/cycle test)
Implementation suggestions
Manufacturers need to pay special attention to:
| Links | Key control points | Inspection frequency |
|---|---|---|
| Raw materials | EC film thickness uniformity ≤2% | Per batch |
| Process | Busbar welding resistance ≤ 0.1Ω | Every hour |
| Factory inspection | Sampling according to AQL 1.0 | Every 1200 pieces |
Sample only — not a preview of GB/T 45921-2025
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
GB/T 11944-2025 in English
Insulating glass unit
2025-12-02
