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  • Vacuum Impregnation Epoxy Sheet


    Vacuum impregnated products are a kind of insulation product without the gap. They are made of alkali-free glass cloth or polyester fiber cloth or other reinforced materials. They are vacuum treated in special moulds and then produced with solvent-free resin filled under high pressure.

     Features and Application of Vacuum Impregnated Epoxy Glass Cloth Sheet
    No.
    Product
    Features & Application
    Temperature Class
    1
    Vacuum Impregnated Epoxy Glass Cloth Sheet
    Dense structure, low water absorption rate, good electrical and mechanical performance.
    Used as structure part in HV apparatus.
    B
    2
    Good thermal resistant, dense structure, low water absorption rate, good electrical and mechanical performance.
    Used as structure part in HV apparatus.
    F
     Properties of Vacuum Impregnated Epoxy Glass Cloth Sheet
    Description
    Unit
    B Class
    F Class
    Density
    g/cm3
    ≥1.90
    ≥1.90
    Resin content
    %
    32±3
    32±3
    Bending strength,longitudinal
    Mpa
     Normal condition
    ≥400
    ≥400
     100℃
    ≥300
     150℃
    ≥200
    Compressive strength
    Normal condition
    Mpa
    ≥450
    ≥450
    Tensile strength
    Longitudinal,normal condition
    Mpa
    ≥300
    ≥300
    Water absorption
    normal condition
    %
    ≤0.15
    ≤0.15
    Volume resistivity
    normal condition
    MΩ.m
    ≥1.0×107
    ≥1.0×107
    Dielectric strength vertical to layers
    Normal condition
    Mv/m
    ≥18.0
    ≥18.0
    Withstand voltage parallet to layers,1min
    Kv
    40
    40
    Arc resistance
    S
    ≥110
    ≥110
  • Vacuum Impregnation (3)