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Thick Electrical Grade Insulation Paper

Pressboard is made from 100% superior sulfate insulating wood pulp. It has good dielectric and high mechanical properties. Pressboard is widely used for transformers, high pressure electric apparatus, current transformers, switches, etc.

Thick Electrical Grade Insulation Paper Technical Characteristics

Properties Units Values
≤1.6mm ﹥1.6-3.0mm ﹥3.0-6.0mm
Thickness Tolerance % ≤ ±7.5 ≤ ±5.0
Density g/cm3 1.0-1.2
Tensile Strength MD Mpa ≥80 ≥80 ≥80
TD ≥55 ≥55 ≥50
Elongation MD % ≥6.0
TD ≥8.0
Shrinkage MD % ﹤0.7
TD ﹤1.0
Thickness ﹤5.0
Moisture Content % ≤8.0
Ash Content % ≤1.0
Electric Conductivity Ms/m ≤8.0
PH of Water Extractives 6.0-9.0
Electric breakdown Strength in oil KV/mm ≥40 ≥30 ≥25