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Aramid Paper Series

The aramid board produced by our company is made of meta-aramid chopped fibers and pulp in accordance with the proportion of copying and pressing, with high strength, high temperature resistance, low dielectric constant and excellent mechanical properties and insulation properties. Performance Unit Product Model Detection Method 593594 Thickness mm3.06.5ASTM D374-99 Allowable Tolerance% ± 6%±8% Density g/cm 0.81.05 Tensile Strength kN/mMD310420ASTMD828-97CD142170 Elongation% MD11.09.8IEC61629-2:1996CD14.21

Key words:

Oil-Immersed Transformer Insulating Materials | Mutual Inductor Insulation Materials

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Product Description

Our aramid paperboards are made of meta-aramid short fibers and pulp, which are pressed and formed in a specific ratio. This product exhibits excellent mechanical properties, such as high strength, as well as superior insulating properties, including high temperature resistance and a low dielectric constant.

Performance	Unit	Product Model				Detection method
		593			594
Thickness	mm	3.0			6.5	ASTM D374-99
Allowable tolerances	%	±6%			±8%
Density	g/cm³	0.8			1.05
tensile strength	kN/m	MD	310		420	ASTM D828-97
		CD	142		170
Elongation	%	MD	11.0		9.8	IEC 61629-2：1996
		CD	14.2		11.2
Electrical performance in air
dielectric strength	KV/mm	16.8			21	ASTM 149-09
dielectric constant	50HZ	2.39			3.0	ASTM D150-11
loss factor	50HZ	8.32 × 10-3			8.0 × 10-3
volume resistivity	Ω · m	5.5 × 1014			6 × 1014	ASTM 257-07
surface resistivity	Ω	6.7 × 1016			8.7 × 1016
Electrical properties in oil
oil absorption rate	%	38			20	IEC 60641-2：2004
dielectric strength	KV/mm	45.5			40.0	ASTM 149-09
dielectric constant	50HZ	3.25			4.0	ASTM D150-11
loss factor	50HZ	20℃		7.11 × 10-3	8.33 × 10-3
		130℃		5.56 × 10-3	9.89 × 10-3
volume resistivity		20℃		1.5 × 1014	2.5 × 1014	ASTM D257-07

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