transformer electrical insulating paper Diamond Dotted Insulation Paper

  Diamond Dotted Insulation Paper is made of electrical insulating paper with diamond-shape epoxy resin dotted in both sides. The epoxy resin used in D.D.P contains a kind of incubative hardener material, it is day and crisp material at normal temperature   Diamond Dotted Insulation Paper has good dielectric properties and good mechanical properties after being heat-solidification. It can be used as insulation material for coils and between layers of oil immerged power and distribution transformers   Diamond Dotted Insulation Paper's technical date:

DDP
Item	Index.		Unit	Value
1	Thickness and tolerance		mm	0.08±0.005/0.13±0.007 0.18/0.20/0.25±0.010
2	Density		g/cm3	0.85~1.10
3	Single thickness		μm	10~15
4	Moisture content		%	4.0~8.0
5	Oil-absorption		%	≥20
6	Bond strength	at room temp.	kPa	≥650
		100°C±2°C		≥450
7	Pollution for transformer oil		-	no pollution(Δtanø<0.001)
8	Tensile Strength	lengthwise	N/10mm	≥60	≥110	≥160	≥180	≥230
		crosswise		≥30	≥50	≥70	≥80	≥100
9	Tearing Strength	lengthwise	Mn	≥450	≥900	≥1350	≥1500	≥2000
		crosswise		≥500	≥1000	≥1500	≥1700	≥2300
10	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