Ethylene-vinyl acetate copolymer (EVA) film for PV module
1Key Takeaways
This standard specifies the terms and definitions, requirements, test methods, inspection rules, packaging, marking, transportation and storage of ethylene-vinyl acetate copolymer (EVA) films for photovoltaic module encapsulation (hereinafter referred to as EVA films). This standard is applicable to EVA films for terre…
2Expert Interpretation
In-depth analysis of GB/T 29848-2018 standard, covering the terminology, physical performance requirements, test methods and technology evolution analysis of ethylene-vinyl acetate copolymer (EVA) film for photovoltaic module encapsulation.
GB/T 29848—2018 Standard Overview
This standard specifies the terms and definitions, requirements, test methods, inspection rules, as well as packaging, marking, transportation and storage of ethylene-vinyl acetate copolymer (EVA) films for photovoltaic module encapsulation.
Technology Evolution Analysis
| Projects | Comparison with GB/T 29848-2013 | |||
|---|---|---|---|---|
| Transparent EVA film | White EVA film | Modified content | ||
| Thickness range | 0.2~0.8 mm | 0.2~0.8 mm | No change | |
| Area density deviation | ±5% | ±5% | New content | |
| Note: Modified content is marked in red | ||||
Terms and Definitions
Transparent EVA film: Made of EVA resin as the main raw material, with additives added, it has a transparent appearance and is used for photovoltaic module encapsulation.
White EVA film: Made of EVA resin as the main raw material, with white fillers and additives added, it has a white appearance and is used for photovoltaic module encapsulation.
Performance Requirements and Test Methods
| Serial Number | Item | Transparent EVA Film Index | White EVA Film Index | |
|---|---|---|---|---|
| 1 | Transmittance (Wavelength Range) | ≥90.5% | - | |
| UV High Transmittance Reflectivity | ≥70% | - | ||
| UV cut-off reflectivity | ≤30% | - | ||
Implementation suggestions
1. Manufacturers should strictly follow the standard requirements for raw material procurement and production process control to ensure that product quality meets the requirements of GB/T 29848-2018.
2. In actual applications, it is recommended that users choose transparent or white EVA film according to specific needs, and select appropriate performance indicators based on environmental conditions.