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Epoxy phenol aldehyde cloth board series
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3240 epoxy phenol aldehyde glass cloth laminated board GB/T1303.1 - 1998
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1 .Define and purpose
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This laminated product is formed through heat pressing after electric industry alkali glass cloth dips into the epoxy phenolic resin. It has high mechanic and dielectric performance, applicable as insulation structural components for electromechanical/electrical equipment, as well as used under damp environmental conditions and in oil of transformer.
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2.Technical requirement
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2.1 The outside appears tidy and smooth, not allow any bubble, impurity or other evident defect, but slight scratch is allowed. Edge is to be cut tidy and the end surface is not allowed to have any delamination and/or crackle.
2.2 Main performance index:
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Table 1 :Performance index
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Order
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Item name
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Unit
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Test method
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Index
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1
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Density
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g/cm3
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GB/T5130 section 8.1
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(1.70-1.90)
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2
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Water absorption
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mg
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GB/T5130 section 8.2
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Refer to table 2
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3
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Vertical layer direction bending strength
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MPa
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GB/T5130 section 5.1
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>= 340
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4
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Vertical layer direction compression strength
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MPa
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GB/T5130 section 5.3
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>= (350)
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5
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Tensile strength
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MPa
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GB/T5130 section 5.7
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>= (300)
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6
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Compact strength (Simply strut-beam method)
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KJ/m3
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GB/T5130 section 5.5.1
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>= 33
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7
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Insulation resistance after water dipping
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Ω
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GB/T5130 section 6.3
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>= 5.0 × 108
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8
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Mediate loss factor, 1MHz hour
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____
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GB/T5130 section 6.2
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<= 0.04
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9
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Dielectric constant, 1MHz hour
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____
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GB/T5130 section 6.2
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<= 5.5
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10
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Vertical layer direction electric strength at （90±2）℃ transformer oil
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KV/mm
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GB/T5130 section 6.1
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Refer to table 3
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11
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Parallel layer direction striking voltage
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kV
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GB/T5130 section 6.1
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>= 35
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Table 2 ： Water absorption
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Average hickness mm
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Water absorption mg
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Average thickness mm
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Water absorption mg
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Average thickness mm
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Water absorption mg
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0.4
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<= 17
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2.0
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<= 20
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10
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<= 34
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0.5
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<= 17
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2.5
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<= 21
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12
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<= 38
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0.6
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<= 17
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3
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<= 22
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14
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<= 41
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0.8
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<= 18
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4
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<= 23
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16
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<= 46
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1.0
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<= 18
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5
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<= 25
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20
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<= 52
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1.2
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<= 18
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6
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<= 27
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25
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<= 61
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1.6
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<= 19
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8
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<= 31
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Single side processing to 22.5
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<= 73
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Table 3 ： Electric strength
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Average thickness mm
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Average strength kV/mm
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Average thickness mm
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Electric strength kV/mm
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Average thickness mm
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Electric strength kV/mm
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0.4
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>= 16.9
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1.0
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>= 14.2
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2.2
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>= 11.4
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0.5
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>= 16.1
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1.2
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>= 13.7
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2.4
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>= 11.1
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0.6
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>= 15.6
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1.4
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>= 13.2
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2.5
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>= 10.9
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0.7
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>= 15.2
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1.6
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>= 12.7
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2.6
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>= 10.8
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0.8
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>= 14.8
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1.8
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>= 12.2
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2.8
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>= 10.5
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0.9
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>= 14.5
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2.0
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>= 11.8
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3.0
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>= 10.2
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Note: the above product is in conformity with UL with yellow card certificate No. E117719.
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