Specialty Polymers for Solar Energy

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High Performance Solutions

Frontsheet and Backsheet

Innovative and customized films and resins produced by Solvay are used in the realization of flexible frontsheets (Halar® ECTFE and Hyflon® PFA/MFA®) and PV backsheets (Solef® PVDF and Halar® ECTFE) thanks to their outstanding properties as:

  • Long-term weatherability
  • Optimal light transmission
  • High moisture barrier for frontsheet and backsheet hydrolysis protection
  • Fire resistance
  • Electrical insulation
  • Light weight

Halar® ECTFE vs ETFE: Aging (Total Transmission)

Relative Behavior ΔTT (WOM)

GF-Relative-Behavior-TT-WOM

WOM ci35

  • Black Panel: 60°C
  • Lamp: Xenon Arc
  • Filter inner and outer: Borosilicate
  • Irradiance: 0,35 W/m2, no dark cycle/no rain cycle

Relative Behavior ΔTT (QUV-B)

GF-Relative-Behavior-TT-QUV

Q-UV Panel

  • UVB 313 nm lamps
  • 8h light at 70°C
  • 4h Condensation 50°C

Halar® ECTFE vs ETFE: Mechanical Properties after Aging

After 10,000 hrs in WOM

GF-Mechanical-Prop-WOM

After 9,000 hrs in QUV

GF-Mechanical-Prop-QUV


Solef PVDF 6008 Initial Properties
UL 94
Flame test class
V-0
Tensile impact test
[kJ/m2 (ft∙lbf/in2)]
81 (38.5)
Tensile strength
[MPa (psi)]
45 (6,525)
Percent retention after conditioning
1000 h UVUL 94 Flame test classV-0
Tensile impact test99
Tensile strength100
7 days water
@ 70ºC (158ºF)
UL 94 Flame test classV-0
Tensile impact test100
Tensile strength95

Artificial Aging using Xenon-Arc WOM and Water Exposure (UL 746C)
Test conditions:

  • Solef PVDF 6008 plates - 1 mm thick
  • Tensile impact test measured in accordance with ASTM D 1822
  • Tensile strength measured in accordance with ASTM D 638


Solef® 1008 PVDF: Accelerated Natural Ageing Test

SI Units
Aging period [months]
04812
Yellowing index (ASTM 1925)1.72.92.93.0
Melting temperature (DSC)°C174174172173
Tensile test at 50 mm/min:
Tensile yield stressMPa40404342
Strength at breakMPa63444745
Elongation at break%520440320460
Modulus*MPa1,2801,490-1,310
Tensile impact strength
(DIN 53448)
kJ/m2450430600380

80 µm thick films produced by flat die extrusion on chill roll
Mechanical properties measured in the machine direction
* Rate = 1 mm/min

US Customary Units
Aging period [months]
04812
Yellowing index (ASTM 1925)1.72.92.93.0
Melting temperature (DSC)°F345345342343
Tensile test at 50 mm/min:
Tensile yield stresspsi5,8005,8006,2356,090
Strength at breakpsi9,1356,3806,8156,525
Elongation at break%520440320460
Modulus*kpsi86216-190
Tensile impact strength
(DIN 53448)
ft*lbf/in2214205285181

80 µm thick films produced by flat die extrusion on chill roll
Mechanical properties measured in the machine direction
* Rate = 1 mm/min

Heat Transfer Fluids

Galden® PFPE fluids include a family of Ultra High Boilers (UHB), perfluoropolyethers specifically engineered for the high temperature applications typical of the PV and solar industries.

Key features

  • Highest boiling point among all the fluorinated fluids
  • Extremely wide operating temperature range (-70°C to +290°C)
  • Excellent safety profile
  • Outstanding chemical inertness
  • No pressure build-up
  • No fire and no explosion hazards

Typical applications

  • Temperature control management of the manufacturing processes of crystalline and thin film PV solar cells
  • Heat transfer fluids in the Solar Thermal and Concentrated Solar Power (CSP) industry
  • Direct coolant in Hybrid PV/T and concentrated PV

Galden® PFPE Grades: Operating Temperature Range

UHB

Lubrication

Fomblin® PFPE are fluorinated lubricants representing the best choice high technology applications including extreme vacuum, PV manufacturing tools, clean room robots and solar tracking systems.

Fomblin® PFPE lubricants are engineered for those applications where heat, chemicals, solvents, corrosion, toxicity, flammability, and service life present lubrication problems. While Fomblin® PFPE lubricants can be used in their original form, they are often formulated into greases for specific applications in the chemical, electronic, military, nuclear, data processing, and other industries in need of high performance lubrication.

Learn more about Fomblin® PFPE Lubricants