The method of solar packing heavily depends on photovoltaic film additives. Adding additives can, first of all, greatly increase the adhesion between the solar silicon crystal panel and the photovoltaic packaging film, which raises the yield. More precisely, additives include thickeners, antioxidants, light stabilizers, and cross-linking agents. The performance of the movie is much enhanced by these additions.

Photovoltaic film can be efficiently kept from aging and its service life extended, for instance, by the use of antioxidants and UV absorbers. Adhesive films are also usually prepared with EVA and POE resin as raw components. Further optimization of the physical and chemical characteristics of the adhesive film is possible by adding suitable amounts of coupling agents, cross-linking agents, co-cross-linking agents, anti-aging additives, and other auxiliary additives.

Selection and optimization of solar film additives in real-world applications require careful consideration of several aspects. For instance, the compatibility issue between POE film components and its formula and additive system are technically challenging. Thus, choosing suitable additives can enhance the performance and dependability of the photovoltaic module as a whole in addition to the adhesion and durability of the film.

Which certain components of solar film additives enhance stability and adhesion the best?

The following components enhance adhesion and stability the best among solar film additives:

Bonding performance of the encapsulating coating for EVA solar cells can be greatly enhanced using a silane coupling agent. Furthermore, research has demonstrated that various silane coupling agents also significantly affect the adhesive characteristics of POE encapsulating films.

Resin that is tacky (like rosin): Hot melt adhesive can attach stronger with tacky resin. Bonding performance of EVA solar cell encapsulating adhesive films can be much increased by adding coupling agents and tackifying resins.

Through the induction of the cross-linking process of EVA resin, cross-linking agents improve the mechanical strength and stability of the adhesive film.

How can POE film compatibility be resolved in photovoltaic modules?

The following factors can be used to begin the solution of the POE film compatibility issue in photovoltaic modules:

Enhancing the compatibility of additives with POE particles is possible by modifying the structure and physical processing techniques of additives. By lessening the precipitation of additives on the film surface, compatibility and performance can be increased generally.

To create a thermoplastic POE film, include unique particle grades to the POE film formula and use scientific formula design. This sort of adhesive film can finish the lamination of components at a lower temperature and does not need a cross-linking reaction, which lessens slippage issues during the process.

Use of composite materials: The outstanding qualities of POE and EVA can be combined and the issue of poor processability of pure POE film overcome by the composite use of POE with other materials (like EVA). This composite material enhances the capacity of the water vapor barrier in addition to PID resistance.

Improvement of the production process and technical means can address the slippage issue of pure POE film in the process. Optimization of the lamination process parameters, for instance, can guarantee the film’s consistency and stability at high temperatures.

What particular factors to keep in mind while selecting photovoltaic film additives for various solar silicon crystal panels?

The subsequent particular aspects must be taken into account while choosing photovoltaic film additives for various solar silicon crystal panels:

Materials: Two often utilized solar film materials are POE and EVA. EVA bonds well with glass and backplanes, is easy to produce, resistant to storage, and has a quick cross-linking speed. It is also somewhat inexpensive. The strong resistivity, good water vapor barrier characteristics, and outstanding anti-PID performance of POE are its advantages.

Processing properties: Because EVA resin is polar, it fuses with polar additives more readily during processing. Its low processing temperature and great melt fluidity allow for quick manufacture. POE calls for extra processing stages like twin-screw extrusion and pretreatment.

Environmental adaptability: The adhesion of the room-temperature EVA film is unaffected by humidity or water absorption and is appropriate for a range of environmental situations. The water vapor barrier qualities and anti-PID performance of the POE film need particular consideration.

Service life: By selecting suitable additives, one may eliminate product flaws, lower the packaging and lamination temperature of EVA film, and so prolong the useful life of solar cell modules. Further prolonging the service life of the solar module are the greatly enhanced weather resistance and bonding strength of the photovoltaic film that may be achieved by the use of photovoltaic film additives.

Situations of application: Various photovoltaic films are appropriate for various situations. For instance, white EVA film is mostly utilized in single-glass and double-glass components; translucent EVA film is inexpensive and frequently used, but it has poor anti-PID function.
It should be mentioned, although, that whatever approach is used, we need to add suitable photovoltaic packaging film additives (especially applied to photovoltaic film-level hot melt adhesives) to improve the success rate of photovoltaic packaging film packing.

The yield of photovoltaic panels greatly depends on the adhesion between solar silicon crystal panels and photovoltaic packaging films. Addition of solar packaging film chemicals is the essential step to achieving this adherence. The yield will rise when additives are added since they will effectively increase the adhesion between the film and the solar silicon crystal panel.

Leading the R&D team of COACES are several senior engineers and doctors. The company is dedicated to the development, manufacture, and servicing of solar packaging film additives. Majority of consumers prefer COACES photovoltaic packaging film additives because of their excellent transparency, low crystal point, high grafting rate, good fluidity, and high resistivity!

COACE’S anti-aging additives

1. R1020 is a photovoltaic-grade ethylene-octene copolymer grafted with silane.
– Main application: Improves adhesion, reduces monomer residue, and increases packing yield for POE photovoltaic film after aging.
Silane content is 2-2.5wt%.
• Recommended use: • POE ranges from 85-92%
• Silane (KH570 or KH171): 0.1-0.2%.
R1020: 8-15%
Use the same amount of acrylate cross-linking agent as without R1020.
Use a modest amount of peroxide cross-linking agent, similar to when not using R1020.

2. R1030: An ethylene-octene copolymer grafted with silane for solar applications.
Main use: enhances adhesion, minimizes monomer residue, and increases packing yield for POE photovoltaic films.
Silane content: 3–3.5%.
• Recommended use: • POE: 90-94%.
• Silane (KH570 or KH171): 0.1-0.2%.
R1030: 6-10%
Use the same amount of acrylate crosslinking agent as when not using R1030.
Use a little amount of peroxide crosslinking agent, same as when not using R1030.

3. R1120 is an acrylate-grafted photovoltaic grade ethylene-octene copolymer.
The main purpose is to improve acrylate dispersion in the film and minimize precipitation from varying polarity of acrylate and ethylene-octene copolymer in the future. Main recommendation:
For pure POE or EPE film P.
• Acrylate content ranges from 0.8-1.2wt%. • Recommended use: (EPE film, P layer) – POE: 88-92%
Keep a little amount of silane from the original formula. If it is not used in the original formula, it might be omitted.
R1120: 8-12%
When not using R1120, reduce the amount of acrylate cross-linking agent by 0.1% from the original.
Use a modest amount of peroxide cross-linking agent, similar to when not using R1120.

4. R2120 is a silane-grafted photovoltaic grade EVA. Its main function is to improve adhesion after aging, particularly in the PCT aging test. It also reduces monomer residue and increases packing yield.
Silicone content: 2-2.5wt%. Recommended use: EVA film.
EVA: 85-90%
Silane can be introduced at less than 0.2% without R2120.
R1120: 10-15%
Use the same amount of acrylate cross-linking agent as when not using R2120.
Use a modest amount of peroxide cross-linking agent, similar to when not using R2120.

5. RM211A is an amino acid resistant additive for EVA.
The main application is to enhance the aging and acid-resistant qualities of EVA solar film in high humidity circumstances.
 Recommended usage: (EVA Film)
 EVA: 85-90%
 Silane can be introduced at less than 0.2% without R2120.
 R1120: 5-10%
• RM211A: around 5%.
Use the same amount of acrylate crosslinking agent as when not using R2120 or RM211A.
Use a tiny amount of peroxide crosslinking agent, the same as when not using R2120 or RM211A.

6. RM210A is an inorganic EVA masterbatch with anti-acidification properties.
Advantages include low adding amount and high efficiency, ease of dispersion, and little effect on transmittance. The recommended additive amount is between 0.5 and 2%.

7. RM208 is an organic masterbatch with anti-acidifying properties. Transmittance is unaffected when compared to inorganic forms. It can trap cations while preventing acid and has some anti-PID properties. The recommended addition is 1-3%.

8. R2320 is an epoxy-functionalized EVA anti-PID auxiliary agent. The recommended addition rate is 2-5%.

The ideal approach is to combine the following:
1-RM210A: 1% + R2320: 4%.
2-RM208: 2% + R2320: 3%.