DDP Diamond Dotted Insulation Paper----[[LIREN ELECTRICAL INSULATION MATERIALS]]

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DDP Diamond Dotted Insulation Paper

Description:

Diamond Dotted Insulation Paper (DDP) consists of electrical insulation paper (IEC 60641) coated on both sides with diamond-shape dotted epoxy resin in B-stage.

DDP Insulation Paper has high electrical and mechanical strength and shows good adhesive property. The epoxy resin can be cured at medium temperature, forming a stable insulation structure.

Application:　

DDP Insulation Paper is mainly used as turn-to-turn and layer insulation in oil immersed power and distribution transformers.

Technical Data:

Item	Properties		Units	LR-DDP90 Typical Values
1	Backing Paper Thickness		mm	0.08	0.13	0.18	0.20	0.25
2	Thickness Tolerance		mm	±0.005	±0.007	±0.01	±0.01	±0.01
3	Coating Thickness per Side		μm	6~12	6~12	6~12	6~12	6~12
4	Tensile Strength	MD	N/10mm	≥60	≥110	≥160	≥180	≥230
5	Tensile Strength	TD	N/10mm	≥30	≥50	≥70	≥80	≥100
6	Bond Strength at 25℃		KPa	≥650	≥650	≥650	≥650	≥650
7	Moisture Content		%	4.0~8.0	4.0~8.0	4.0~8.0	4.0~8.0	4.0~8.0
8	Oil Absorption		%	≥20	≥20	≥20	≥20	≥20
9	Breakdown Voltage in Air		KV	≥0.88	≥1.37	≥2.00	≥2.10	≥2.25
10	Breakdown Voltage in Oil		KV	≥4.40	≥7.00	≥9.00	≥9.80	≥11.50
11	Curing Condition		3h at 90℃±5℃, 6h at 125℃±5℃

Rolls: 3" paper or plastic core, max. width 1200mm; standard width 960mm, 1000mm.
Tapes: from 5mm width upwards

※ Special thickness or combinations can be supplied per customer’s request.

Shelf Life:

Minimum 6 months at 30°C; Minimum 12 months at 5°C

Note: The technical information, data, recommendations, and other statements provided are based on tests or research which we believe to be reliable, but such information shall in no event constitute a warranty of any kind by Liren. Before using this product, all purchasers should carefully evaluate its suitability for their intended applications.

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