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        Composite Backsheet

        Product Series

         Models

        Structure 

        Thickness

         Color

        BEC 303

         

        PVDF/Adhesive/PET/F-coating

        290μm

        White/Black

        PVDF/Adhesive/PET/F-coating

        290μm

        High Reflectivity Black

        BEC-303

         

        PVDF/Adhesive/PET/F-coating

        305μm

        White/Black

        PVDF/Adhesive/PET/F-coating

        305μm

        High Reflectivity Black

        BEF-302

        PVDF/Adhesive/PET/Adhesive/PVDF

        320μm

        White



        Introduction

        Firstbacksheet?  BEC-303 has a structure of the PET film sandwiched by PVDF film and Fluorine polymer. BEC-303 has excellent weather-resistance properties, the EVA side provides high reflectivity and strong adhesion, the air side undergoes long-term aging test, which can ensure the safety and stability of  modules.

        Firstbacksheet?  BEF-302 is designed as multi-layer structure. Hydrolysis resistant PET acts as middle substrate,  and both sides are laminated with PVDF films by automation precision process. The adhesion between PET and PVDF is high and stable, no delamination at long-term field exposure. 


        Basic Property

        Properties

        Method

        Units

        BEC 303

        BEC-303

        BEF-302

        Peel strength to EVA

        GB/T 2790

        N/10mm

        >60

        >60

        >60

        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

        >1000

        >1500

        >1500

        Breakdown voltage

        GB.T 1408

        kV

        >17

        >20

        >20

        Reflectivity white

        400-1100nm

        ASTM E1164

        %

        75%

        75%

        75%

        Reflectivity  HR black

        800-1100nm

        ASTM E1164

        %

        50%

        50%

        50%

        Application scenarios

        .

        .

        1000VDC system

        UL1703 type 1 / 1500VDC system

        UL1703 type 1 /

        1500VDC system



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