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    Special Functional Type Backsheet—Transparent/1500V High Voltage

    Product Series

     Models

     Structure 

    Thickness

     Color

    BEC-301T

    F-coating/PET/F-coating

    305μm

    Transparent

    BEC-301TM

    F-coating/PET/F-coating/Mesh

    325μm

    Transparent+mesh

    BEC-303T

    PVDF/Adhesive/PET/F-coating

    325μm

    Transparent

    BEC-303TM

    PVDF/Adhesive/PET/F-coating/Mesh

    345μm

    Transparent+mesh

    BEC-306T

    PVF/Adhesive/PET/F-coating

    325μm

    Transparent

    BEC-306TM

    PVF/Adhesive/PET/F-coating/Mesh

    345μm

    Transparent+mesh


    Introduction

    Firstbacksheet?  BEF-402 is a backsheet with more than 1500VDC partial discharge, which consist of PO layer, hydrolysis resistant PET layer and two fluorine coating layers. BEF-402 has excellent insulation and moisture barrier property, which can  meet the application  requirement of high voltage PV modules. 
    Firstbacksheet?  BEC-301T is transparent designed as tri-layer structure, which not only has high light transmittance and low haze, but also has excellent insulation performance and long term weather durability property. BEC-301T can be used in building and double power modules with the advantage in lightweight and lamination condition. 


    Basic Property

    Properties

    Method

    Units

    BEC-301T

    BEC-303T

    BEC-306T

    Peel strength to EVA

    GB/T 2790

    N/10mm

    >60

    >60

    >60

    Transmittance

    400-1100nm

    GB/T 29848

    %

    90%

    90%

    90%

    Mesh Reflectivity white

    400-1100nm

    ASTM E1164

    %

    75%

    75%

    75%

    Thermal shrinkage

    ASTMD2305

    %

    <0.5%/0.25%

    <0.5%/0.25%

    <0.5%/0.25%

    Tensile strength at break

    GB.T 13542.2

    MPa

    >100

    >100

    >100

    Elongation at break

    GB.T 13542.2

    %

    >100%

    >100%

    >100%

    WVTR

    ASTM F1249

    g/m2.24h

    <2.0

    <2.0

    <2.0

    CTI

    IEC 60112

    V

    >600

    >600

    >600

    Partial discharge

    IEC 60664-1

    VDC

    >1500

    >1500

    >1500

    Breakdown voltage

    GB.T 1408

    kV

    >20

    >20

    >20

    Application scenarios

    .

    .

    Double PV  Modules

    Double PV  Modules

    Double PV  Modules



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