Diamond Pattern Paper DDP

H class insulation paper, high quality diamond pattern paper, various specification for your choices.

  Brief introduction

 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 a dry and crisp material at normal temperature(below35 centigrade)It can be used as insulation material for coils and between layers of oil immerged power and distribution transformers.

Technical parameters:

Item	Index.		Unit	Value
1	Thickness and tolerance		mm	0.08±0.005	0.13±0.007	0.18±0.010	0.20±0.010	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		≥400
7	Pollution for transformer oil		-	no pollution
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

Diamond Pattern Paper DDP