Thick Electrical Grade Insulation Paper

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Pressboard - 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.
Pressboard – Thick Electrical Grade Insulation Paper Technical Characteristics
Properties
Units  
Values


≤1.6mm
﹥1.6-3.0mm
﹥3.0-6.0mm
厚度允许公差
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

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