Diamond Dotted Paper (D.D.P)

µ Properties and Characteristics

D.D.P 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 (below 35℃). This flexible material has good dielectric properties and good mechanical properties after being heat-solidification.

µ Range of Application

Mainly being used as insulation material for coils and between layers of oil immerged power and distribution transformers.

µ Main Property Data

Property	Unit	Standard Value
Thickness	mm	0.08±0.005	0.12±0.007	0.17±0.01
Tensile strength MD	Mpa	＞75	＞80	＞78
Tensile strength CMD	Mpa	＞37	＞38	＞35
Tear-resistance	mN	＞500	＞1000	＞1500
Breakdown voltage	V	＞800	＞1100	＞1400
Moisture content	%	4.0~8.0 0.02±0.0125 ＞350
Thickness of adhesion	mm
Bonding strength	Kap

µ Curing Condition

100±5℃/3h+125±5℃/6h