Support

What happens if I use thinner encapsulant?

When using thinner encapsulant, you can save some cost however this can have severe impact on module’s reliability. A thinner encapsulant may not be able to withstand constant environment stresses that a module undergoes in field. Also, it might be unable to provide sufficient electrical protection properties, leading to lower than expected performance.

Brij recommends using EVA of 0.45mm thickness.

What are the standard available widths of encapsulant?

Brij stocks a variety of sizes of EVA in its warehouse for ready dispatch. Since this depends on the market requirements, it is best to contact us to know the sizes and stocks.

What widths can Brij manufacturer?

In our state of the art manufacturing facility, we can manufacturer widths upto 1300mm.

What is the indicative turn around time for dispatch?

For standard widths, generally goods can be dispatched within 72 hours from our warehouse. For non standard or special requirements, dispatch can be made within 10 days.

However it is important to confirm delivery terms at the time of purchase.

Bubble Formations

Why. It might be due to a variety of reasons like
  • Insufficient Vacuum/Sealed air in EVA
  • Unclean glass or other materials
  • Expired Product/Improper storage
Solutions. Following solutions are recommended
  • It may help to extend vacuum time and pressure & ensure that the laminating chamber is properly sealed. Also check the vacuum pump pumping rate to ensure that air is sucked completely before melting of EVA.
  •  It is recommended to have a dust free laminating conditions to prevent contamination of the laminate with dust particles.
  • Ensure that the EVA is not expired and sealed & stored in its original packaging

Low Adhesion

Why. It might be due to
  • Inappropriate curing parameters
  • Non uniform curing
  • Expired EVA/Improper Storage
  • Unclean glass or other materials

 

Solutions. The following solutions are recommended

  • Different EVA manufacturers have different parameters. Make sure the parameters are configured appropriately for Brij EVA. Improper curing will lead to incomplete crosslinking and hence less adhesion.
  • Ensure that curing is complete throughout the module. A deviation in properties of upto 30% can occur at different points on the laminate. This is generally due to the time difference between the center and the corners in reaching optimum curing temperature.
  • It is recommended to have a dust free laminating conditions to prevent contamination of the laminate with dust particles.
  • Ensure that the EVA is not expired and sealed & stored in its original packaging.

Technical Support

Brij is proud to offer high quality service and support to its customers. Through constant research and development in our in-house testing laboratory, continuous customer interaction, we have constantly improved our product and made it excel under harsh environmental conditions.

It is important to understand the curing cycle of the EVA to have a good laminate:

This graph shows the various stages in the EVA curing cycle based on temperature in the laminator. Melting temperature of EVA is about 65°C. At that temperature EVA starts to melt. Care must be taken that vacuum has been reached before EVA melting to prevent bubbles or have a clean laminate.
Curing and crosslinking of EVA are reflected in the adhesion and transparency of the final product. It is important to have a fully cured EVA for it to provide the required mechanical strength to the Silicon cells

This graph shows the variation of pressure with time in the lamination process. It is required that sufficient vacuum has been reached in the chamber before EVA melting to ensure no bubble formation. Also uniform pressing should be maintained to ensure uniform thick layer of EVA in the final laminate.