EVA encapsulant is a thin sheet with a large effect on module yield: it optically couples the cell to the world and mechanically locks the stack together. Visual defects and slow power loss often trace back to how that film was stored, laminated, or formulated. This article covers reliability built in the laminator, matching the grade to climate and cell type, and why EVA remains central even as POE and EPE take share in more demanding designs. The full technical article is in the PDF below.
What Distinguishes a Leading Solar EVA Manufacturer
A leading solar EVA manufacturer is distinguished by what goes into the sheet and how tightly it can be repeated, not by catalogue adjectives. Consistent copolymer and a designed additive package—crosslinking, UV stabilization, antioxidants, and where needed adhesion or resistivity modifiers—decide whether the film laminates clear, stays adherent, and ages slowly. This article explains why thickness, shrinkage, and gel content should be treated as process capabilities, why buyers should ask for documented weathering and PID evidence, and why leadership also means matching the film to the module, including POE or EPE when EVA is not the whole answer. The full technical article is in the PDF below.
The Role of EVA Film in Solar Module Production
EVA film is the encapsulant that turns a loose solar-module stack into a sealed, optically coupled package. Laid above and below the cell string, it flows, wets, and then crosslinks in the laminator, keeping moisture, dust, and mechanical strain away from the cells and leading light toward them rather than losing it in air gaps or a cloudy polymer. This article explains what the film must do on the production line, why high-transmittance and anti-shift grades matter, and why factories still specify EVA even as POE and EPE take share in more demanding designs. The full technical article is in the PDF below.
EVA Films Explained: Benefits for Modern Manufacturing
EVA film is a crosslinking interlayer used in laminated glass and photovoltaic modules. This technical article explains what the film is, why factories choose it, how to treat cost as the cost per good unit rather than the roll price, and how to state environmental benefits honestly. Clarity, adhesion, lifetime, and a workable cost only hold when the grade is specified for the product you actually make and is processed to a finished cure.
FAQ
What is EVA film?
EVA is a copolymer of ethylene and vinyl acetate, extruded as a sheet and formulated with a crosslinking system. In the roll it is a thermoplastic; in the laminator it flows, wets the glass, and becomes a gelled interlayer. It is used as an encapsulant in photovoltaic modules and as an interlayer in laminated glass.
How should factories think about the cost of EVA film?
The relevant cost is the cost per good unit that leaves the line, including scrap, rework, and any early field failure, not just the roll price. EVA is cost-effective when it laminates cleanly and lasts.
How should environmental benefits of EVA be stated?
A long-lived product and a low scrap rate are the environmental benefits a manufacturer can honestly claim. The polymer itself is not a recycled-content hero in its crosslinked form, and end-of-life systems for laminates are still developing.
SGP INTERLAYER Made in China, Not Dupont, Not Kuraray, but China Brand
SGP ionoplast Interlayer for Structural Laminated Safety Glass
SGP: 100 times stiffer and 5 times stronger than PVB used as anti-explosion or anti-hurracane solution
Made In China
Replacing“Dupont”Kuraray SGP
Color: Super clear
Thickness:0.76mm
Width:1650mm, 2000mm or 2440mm
Liner length per roll:50M, 100M, 150M or 200M
Thickness:1.14mm
Width:1650mm, 2000mm or 2440mm
Liner length per roll:50M, 100M, 150M or 200M
Recipe of Heating SGP INTERLAYER Laminated Glass in EVA Vacuum Ovens
Please note that Not all EVA vacuum oven can laminate SGP interlayer, some can, some can not.
【1】The EVA ovens may work slightly differently, so you need to do some adjusting by yourselves based on real situations.
【2】Vacuum pressure: should be stronger than 101 kPa
【3】Low temperature stage:
Cold vacuuming for 5 mins
10mins heating up to 65℃
Holding at 65℃ for 30mins
【4】High temperature stage(Cooking time) : at 135 degrees C for 3.5 hours
【5】Always put only one piece of pre-SGP laminated glass per vacuum bag, you can not stack or place multiple pieces in one bag(or you may have bubbles problem).
The above data is based on [6mmGLASS+0.76mmSGP+6mmGLASS], if you laminating thicker interlayer or thicker glass, please keep the same temperature, but prolong the holding time for high temperature stage by 10-30mins.
Contact us, if you need help:
Peter Lin
cnc@cncGlass.com
Whatsapp: +86 15013829504
WeChat: wecan365
Mobile: +86 15013829504
www.cncglass.com
Autoclave Heating Cycle Recipe of SGP Laminated Glass Process Guide
【1】Laminating room:
Temperature: 22°C – 28°C Humidity: 18% – 28%
【2】Rolling: the glass surface temperature after rolling should be:63±8℃
【3】Autoclave:
Temperature:135°C(no over 137.8℃) Pressure:180–200psi (12–14 bar) Time:60 minutes(can be longer) Cooling speed:3℃/MIN
Datasheet of SGP Interlayer
| Item | CNC SGP | Certification of Detection | Kuraray SGP | Certification of Detection |
| Tear Strength | 165.4KN/m (1.54mm) | ASTM D-624 | 50MJ/m³ (2.3mm) | ASTM D-638 |
| Tensile Strength | 37.7Mpa | ASTM D-638 | 28.1Mpa | ASTM D-638 |
| Elongation at Break | 330% (1.54mm) | ASTM-412 | 400% (2.3mm) | ASTM-412 |
| Proportion | 0.95 | ASTM-792 | 0.95 | ASTM-792 |
| Haze | <0.3% | JC/T 2166-2013 | <0.2% | JC/T 2166-2013 |
| Yellow Index | <1.5 | JC/T 2166-2013 | <0.7 | JC/T 2166-2013 |
| Refractive Index | 1.5 | JC/T 2166-2013 | 1.5 | JC/T 2166-2013 |
| Transimittance | 88% | JC/T 2166-2013 | 89% | JC/T 2166-2013 |
| UV Block | 99.90% | GB15763.3-2009 | 99.90% | GB15763.3-2009 |
| Moisture Content | <0.08% | JC/T 2166-2013 | <0.2% | JC/T 2166-2013 |
| Knock Value | ≥7 | JC/T 2166-2013 | ≥7 | JC/T 2166-2013 |
| Melting Point | 470℃ | ASTM D-1929 | 470℃ | ASTM D-1929 |
| Thermal Contraction | ≤3% | JC/T 2166-2013 | ≤3% | JC/T 2166-2013 |
If you want to order, please simply send us an email.
Peter Lin
cnc@cncGlass.com
Whatsapp: +86 15013829504
WeChat: wecan365
Mobile: +86 15013829504
SGP Interlayer Made in China, Not Dupont, Not Kuraray, but China original brand
SGP Interlayer Made in China, Not Dupont, Not Kuraray, but China original brand
Green Polyester Tape for glass lamination edge masking
to remove excess SGP interlayer remains from laminated glass, heavy duty heat cutter (3)
to remove excess SGP interlayer remains from laminated glass, heavy duty heat cutter (3)
Reusable Silicone bag for eva sgp glass lamination vacuuming
Reusable Silicone bag for eva sgp glass lamination vacuuming
