Specialty Encapsulants

PhotoMark® eTPU™ is a thermoplastic encapsulant that offers excellent strength and outstanding resistance to moisture and UV light.

Users benefit from its high bond to cells, glass and substrates. This high performance aliphatic polyether thermoplastic polyurethane film can be laminated into a range of glass and plastics components. Thickness is customizable based on customers’ needs.

Performance features of PhotoMark® eTPU™ include:

  • Excellent laminated transparency
  • Superior hydrolysis & microbial resistance
  • Outstanding low temperature flexibility
  • Medium durometer and modulus
  • Adhesion promotion
  • Exceptional cold impact

Relying on its two-decade history in PV innovation, Tomark-Worthen has created this breakthrough product. Based on known materials that have excellent track records in outdoor applications and provide excellent laminator qualities, PhotoMark® eTPU™ makes panels more durable and cost effective.

PhotoMark® eIonomer™ is a thermoplastic encapsulant that offers excellent strength, UV resistance and high bond to cells, glass and substrates, including PET.

This product reduces lamination cycle time and minimizes moisture ingress. An ionomer of ethylene acid copolymer, it has a proven track record as an encapsulant for CIGS technology in thin film PV applications. Users benefit from its excellent isolation performance, electrical resistivity, rigidity and durability.

PhotoMark® eIonomer has a wide variety of performance features, including:

  • Reduced cycle time versus PVB or EVA
  • Low moisture pickup, diffusion coefficients and moisture equilibrium levels
  • Excellent laminated transparency
  • Superior hydrolysis and microbial resistance
  • Medium durometer and modulus
  • No Potential Induced Degradation (PID)
  • No degradation of polymer forming acetic acid
  • Exceptional low-temperature flexibility
  • Outstanding cold impact

Relying on its two-decade history in PV innovation, Tomark-Worthen has created this breakthrough product. Based on known materials that have excellent track records in outdoor applications and provide excellent laminator qualities, PhotoMark® eIonomer™ will help make your panel more reliable and competitive.

Tensile Strength, MPa: 45
Modulus, MPa (100%,300%): 2, 7
Elongation, %: 500
Tear Resistance, N/mm: 37
Hardness, Shore A: 80
Specific Gravity: 1.07
Softening Point, (ºC): 80
Melting Point, (ºC): 140
Tg Midpoint (ºC): -36
Light Transmittance, (%): 90
Haze, (%): 0.31
Refractive Index: 1.5

For more information on this product, contact us using the form below.