Electrical Insulation Pressboard

Thickness:5.5mm
Electrical Insulation Pressboard is a special product based on the purest cellulose, extracted from long-fibered coniferous trees. electrical insulation pressboard produced by our company has strict quality control.

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Description

Products Description

Electrical Insulation Pressboard is a special product based on the purest cellulose, extracted from long-fibered coniferous trees. electrical insulation pressboard produced by our company has strict quality control.

These are formed into a non-woven material without using any additional binding agents and then pressed.

The high chemical purity means pressboard is an extremely suitable insulation material for electrical machines (impregnated with resin), capacitors (impregnated with oil or resin) and particularly oil-filled transformers. The material properties allow classification in insulation class A (105° C) and are manufactured in accordance with the IEC standard.

Product parameters

Product Name	3.0mm Natural - colored Electrical Insulating Paperboard	Production Time	2024.09	/
Standard Code	IEC60641 - 3 - 1:2008	Quality Grade	Premium Grade	/
Inspection Items	Unit	Standard Requirements	Inspection Results	Testing Method
Thickness Tolerance	%	±5.0	2.9	/
Bulk Density	g/cm³	1.05 - 1.20	1.19	/
Tensile Strength	Longitudinal	N/mm²	≥85	96.8
	Transverse	N/mm²	≥50	67.8
Elongation	Longitudinal	%	≥3.0	5.3
	Transverse	%	≥4.0	6.2
Shrinkage	Longitudinal	%	≤0.7	0.59
	Transverse	%	≤1.0	0.65
	Thickness - direction	%	≤6.0	5.8
Ash Content	%	≤0.7	0.66	/
Oil Absorption Rate	%	≥11.0	21.3
pH Value of Aqueous Extract	/	6 - 9	7.45
Electrical Conductivity of Aqueous Extract	mS/m	≤6.0	5.8
Electrical Strength (in Oil)	kV/mm	≥35	35.4
Electrical Strength (in Air)	kV/mm	≥12	12.3
Moisture Content at Delivery	%	≤6.0	5.9