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Hitachi

Hitachi High-Tech in America

Backsheet for solar cell modules

Backsheet for solar cell modules

Backsheet for solar cell modules

Overview

A back sheet for solar cell modules which possesses excellent long-term reliability. The newly developed M-Polyester film drastically extends the lifetimes of solar cell modules. Combined use with the Epr coating layer significantly improves adhesiveness with EVA film.

Specifications

Hydrolysis resistance is 4 times greater than PET film

  • Hydrolysis resistance of M-Polyester: Pressure cooker test (121°C, 2 atm, 100% RH)

Fig. 1 Fracture strength retention
Fig. 1 Fracture strength retention

Fig. 2 Fracture strength retention
Fig. 2 Fracture strength retention

PET, Hydrolysis resistant PET, M-Polyester

M-Polyester cuts ultraviolet rays of 380 nm or less.

  • Ultraviolet light transmittance of M-Polyester

fig. Ultraviolet light transmittance of M-Polyester

PET, M-Polyester

  • Deterioration of M-Polyester on exposure to ultraviolet light

Fig. 1 Fracture strength retention
Fig. 1 Fracture strength retention

Fig. 2 Fracture strength retention
Fig. 2 Fracture strength retention

PET, Hydrolysis resistant PET, M-Polyester