DDP/ Insulating Dimond Dotted Paper/ Epoxy Dotted Paper for Transformer Winding

Product Description

Diamond Dotted Paper

DDP/ Insulating Dimond Dotted Paper/ Epoxy Dotted Paper for Transformer Winding

Diamond Dotted Paper is made of electrical grade Insulating paper coated with B-stage heat curable epoxy resin on one side. It is used in Oil-immersed Transformers for insulation between coils.
The Diamond Dotted Paper, alias such as: Epoxy adhesive diamond paper, Diamond Dotted Presspaper, Double sided Diamond Pattern Paper, DDPP, DPRCP, D. D. P, DPP, Diamond Dotted insulating Paper, Varnished Paper, etc.

Item		Unit	Value
Thickness of base material		mm	0.08±0.005	0.13±0.007	0.18±0.01	0.20±0.01	0.25±0.01
Density of base material		g/cm3	0.85~1.10
Thickness one side adhesive		μm	10~15
Moisture		%	4.0~8.0
Oil absorption		%	≥20
Welding strength	Room temperature	kpa	≥650
	100oC±2oC		≥400
Pollution of transformer oil		--	No pollution (tanδ<0.001)<>
Tensile Strength	Perpendicular	N/10mm Width	≥60	≥110	≥160	≥180	≥230
	Parallel		≥30	≥50	≥70	≥80	≥100
Tear Strength	Perpendicular	mN	≥450	≥900	≥1350	≥1500	≥2000
	Parallel		≥500	≥1000	≥1500	≥1700	≥2300
Breakdown Voltage	In air	kv	≥0.88	≥1.37	≥2.00	≥2.10	≥2.25
	In oil		≥4.40	≥7.00	≥9.00	≥9.80	≥11.50

<0.001)<>

Last：Insulating Epoxy Dotted Paper/ DDP for Transformer Winding Next：Insulation Material Duct Spacing for High Voltage Power Oil Transformer

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