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Borealis

Photo: Borealis Quentys™ grades are used to encapsulate and protect the solar cells mounted on the racing car built by the Agoria Solar Team.
Photo: © Agoria Solar Team

Solar encapsulant film based on grades from Borealis’ pioneering Quentys™ portfolio will protect the roof-mounted solar panels on the team’s racing car and maximize their potential. Borealis and Borouge’s support reflects their aim to empower solar energy on an international scale, by making it more reliable, efficient and affordable.

Borealis Borouge

Solid ownership


and global reach

Solid ownership and global reach

We are a bankable company and have proven our reliability as a partner for the energy sector worldwide.

Borealis is a leader in the global polyolefin industry, backed by a strong and strategic ownership foundation shared with our joint venture Borouge.

We have a strong track record of constant growth that enables us to advance innovative ideas all over the world in various industries, including automotive, piping, healthcare, packaging, and wire and cable.

Our experience partnering with the energy industry includes 45 years of innovating demanding cable applications for which reliability and performance are a must. Today, we continue to drive our international expansion, establishing local presences to keep pace with the growth of the global solar market.

Throughout the value chain we strive for effective cooperation with our business partners to ensure our products meet their expectations. And by actively collaborating with international standardisation bodies, we take responsibility for securing the long-term performance of solar modules and protecting the environment.

New Polyolefin based encapsulant from Borealis

Borealis has introduced new polyolefin based encapsulant film grades (Quentys™ BPO) for solar photovoltaic modules. The new encapsulant is thermoplastic in nature and is free of organic peroxide. The lamination cycle time with this encapsulant can be reduced significantly compared to conventional EVA and other polyolefin based encapsulants.

Making solar energy


more affordable

Our encapsulants increase the reliability, performance and cost efficiency of solar power modules.

Our encapsulants increase the reliability, performance and cost efficiency of solar power modules.

Third-party comparative testing* confirms that Borealis encapsulants extend the lifetime of solar modules and increase their power output over time because they offer industry-leading resistance against:

  • Moisture induced corrosion
  • UV induced degradation
  • Electrochemical failures

* Tüv Rheinland, Fraunhofer & imec

Borealis Quentys™ grades boost a solar racing team

Borealis and Borouge, leading providers of innovative, value-creating plastics solutions, are supporting a Belgium-based racing team taking part in the 2019 Bridgestone World Solar Challenge in Australia. Known as the world championship for solar cars, the 3,000-km race across the outback is the ultimate test for a solar-powered vehicle.

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Evaluation of module performance after extended accelerated ageing tests

In the current study, we present the evaluation of solar PV modules made with the Borealis encapsulant after various accelerated ageing tests, like damp heat, thermal cycling, humidity freeze test and PID test.

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Evaluation of module performance after extended thermal and UV ageing

In the current study, we present the evaluation of solar PV modules made with the Borealis encapsulant after thermal and UV ageing.

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Evaluation of module performance after multiple combined stress test cycles

In the current study, we present the evaluation of solar PV modules made with Quentys™ BPO and reference EVA encapsulants after a combined stress test sequence developed by Fraunhofer ISE, Freiburg, Germany.

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Value creation


through innovation

Value creation through innovation

Through step change innovations, we can supply the solar industry with superior materials for the production of photovoltaic modules.

Lamination

Borealis encapsulants offer improved reliability and processing in the lamination process.

  • Fewer failures reduces production losses
  • Compatible with different types of laminators

Cost reduction

In addition to processing benefits, our products also provide secondary advantages.

  • Significant electricity cost savings
  • Reduced maintenance

Higher output

The outstanding processability of our encapsulants ensures optimised productivity.

  • Significant reduction in lamination cycle time
  • Capacity increase without investment

Outstanding performance

Our materials are suitable for key market segments, enabling distinctive solar module capabilities.

  • Standard & double glass modules
  • Resistance to harsh climate conditions
  • Suitable for modules with higher system voltage

New Polypropylene based advanced compounds for production of backsheets

Polypropylene (PP) based advanced compounds designed specially for production of backsheet layers, providing clear advantages over PET backsheets.  Borealis makes these PP compounds available to the market by partnering with selected backsheet producers.

  • Quentys SF700CL  (core layer)
  • Quentys SF900WL (white outer layer)
  • Quentys SF900BK (black outer layer)

Borealis offers PP compounds that pass all test in the PV industry.

  • Tensile Modulus
  • Tensile Strength
  • Elongation at Break
  • Distance Through Insulation
  • Shrinkage
  • Thermal expansion
  • Thermal Cycle Test
  • Damp Heat Test
  • Relative Temperature Index
  • Hydrolytic Stability
  • UV resistance
Mechanical properties
Long term stability
Optical Properties
Electrical Properties
Processing behavior
Film appearance
Adhesion
  • Reflectiveness
  • Adhesion between layers
  • Adhesion to junction box
  • Water vapor transmission rate
  • Acetic acid permeability
  • Heat conductivity
  • Electrical Insulation

Standard PP grades will not pass all these tests for production of backsheet layers.

Coextruded PP based backsheets offer unmatched benefits for the backsheet and the module producer.

Backsheet producer

Reduced processing complexity
  • Coextrusion: a one-step production process
  • Fast and cost efficient process

Module producer

Improved module reliability
Extended module lifetime
  • No adhesives: reduced risk for delamination
  • Excellent hydrolitic stability
  • Low WVTR
  • High acetic acid permeability

The key strength of PP in comparison with PET and PA is the hydrolytic stability

TestConditionsOutcome
Damp Heat test85°C, 85 % r.h. 10.000hNo delamination
HAST test121°C, 100 % r.h. 250hNo delamination


The combination of humidity & UV is harsh for PET, therefore it needs protection by fluorinated outer layers.

The Borealis PP grades do not need this extra protection. It allows backsheet produces to replace the core PET layer by a core PP layer in laminated and coated backsheets and/ or using a 3 layer co-extrusion process with Borealis PP compounds to reduce the environmental footprint of the backsheets used in Solar PV.

Quentys™ SF700CL is a Polypropylene compound designed as a core layer backsheet offering clear advantages in backsheet production

ResinDensityWVTROwn co-extrusion possible
PET1,38<2g/M2.24hNO
SF700CL1,020,8g/M2.24hYES
1. Density difference
  • Less kg SF700CL versus PET per SQM
2. WVTR
  • Reduce thickness of core layer with SF700CL versus PET
3. Co-Extrusion
  • Go in-house co-extrusion of SF700CL versus buying a PET layer film


QUENTYSTM offers a step change in production cost efficiency for module makers while increasing power output, lifetime performance and reliability of PV modules.

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