Chengdu Q-Mantic Industrial Products Co, Ltd.

Technical Information

Diamond Pattern Resin Coated Paper(DDP)

Product No.:MAL07

MAL0780/MAL07130/MAL07180MAL07200/MAL07250

Diamond Dotted Insulation PaperDDP) is made of electrical insulation paper with diamond-shaped epoxy resin dotted on 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℃)

DDP is a special modified epoxy coated in rhomboid on electrical insulating paper. It is widely used in interlayer and turn insulation of oil-immersed power transformer. When in use, the coating layer begins to melt at a certain temperature during the coil drying process, resulting in adhesion. As the temperature rises, it begins to solidify again, so that the adjacent layers of the windings are reliably bonded into a fixed unit. The bonding strength of the epoxy is sufficient to prevent the winding layers from shifting during short circuits, thus ensuring the long term mechanical and electrical performance of the insulation.

Because the resin coating of rhombic gluing insulating paper is point-like, it ensures the oil immersing and the gas discharging from the insulating material, effectively avoids corona and partial discharge, and thus ensures the safety and reliability of the insulating structure.


Product Detail

Product Tags

Characteristic

Property Name

General Table of Properties

Thickness of Base Paper(µm)

80

130

180

200

250

Thickness Tolerance(%)

5

7

10

Density of Base Paper (g/cm3)

0.85-1.1

Ash content<(%)

1.0

PH of Aqueous Extract

6.5-8.5

One side Adhesive Thickness(µm)

6-12

Tensile Strength

(N/10mm)

MD

60

110

160

180

230

MCD

30

50

70

80

100

Moisture(%)

4.0-8.0

Bond Strength(Kpa) ≥

400

Elongation

(%)

MD

2.0

MCD

4.0

Breakdown Voltage(Kv)

In Air

0.88

1.37

2.00

2.10

2.25

In Oil

4.40

7.00

9.00

9.80

11.50

Cure Temperature And Time

Low temp. 90±5℃≥3h, then high temp. 120±5℃≥6h

Storage Condition

Storage temp.≤35℃
Stored in dry, clean and ventilated condition.
Away from the fire, high temperature and direct sunshine.

Application

Good dielectric properties and mechanical properties after being heat-solidification. As interturn insulation for coils of oil-immersed transformers interlayer insulation of distribution transformers.

Packing and Storage

Min. slitting width: 6mm
Core ID: 3” / 6”
Storage: Keep in room temperature. Remove package before use. Unused parts are wrapped in original packaging to avoid moisture absorption. It is recommended to be used up in 6 months.

Chengdu Q-Mantic Industrial Products Co.,Ltd .
Tel: +86 28 64660018
E-mail: sales@cdq-mantic.com
Website: www.cdq-mantic.com

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