DDP has stable electrical and mechanical properties

 

Description:

Diamon dotted paper is made of insulation paper coated by modified epoxy resin in the shape of rhombus.  It is widely used for interlayer and turn insulation of oil-immersed transformer and reactors. In the process of coil drying, the agglutinating and solidifying of DDP can bond the coil into a fixed unit.

The bonding strength of epoxy resin is sufficient to prevent the displacement of the various layers of the winding in short circuit condition and further ensure the long-term mechanical and electrical properties of insulation structure.

Specifications:

Thickness: 80um,130um,180um,200um,250um,300um

Width:  625mm/980mm (Ribbon is available.)

Roll Diameter: 250~300mm    Weight of each roll: 45~60Kg

Property Index:

Standard: JB / T1004.3-2004
No.
Properties Unit 0.08 0.13 0.18 0.20 0.25
Index
1 Thickness & Tolerance mm 0.080±0.005 0.130±0.007 0.180±0.010 0.200±0.010 0.250±0.010
2 Density g/m2 0.85-1.1
3 Moisture Content % 4.0-8.0
4 Water Extraction PH 6.5-8.5
5 Ash Content % ≤1.0
6 One Side Adhesive Thickness µm 6-12
7 Oil Absorbency % ≥20
8   Contamination to Transformer Oil No Contamination
9 Bond Strength

 

Normal KPa ≥650
100℃±2℃ ≥400
10 Tensile Strength MD N/10mm ≥60 ≥110 ≥160 ≥180 ≥230
CD ≥30 ≥50 ≥70 ≥80 ≥100
11 Elongation MD % ≥2.0
CD ≥4.0
12 Tear Strength MD MN ≥450 ≥900 ≥1350 ≥1500 ≥2000
CD ≥500 ≥1000 ≥1500 ≥1700 ≥2300
13 Breakdown Voltage In the air KV ≥0.8 ≥1.37 ≥2.00 ≥2.10 ≥2.25
In the oil ≥4.00 ≥7.00 ≥9.00 ≥9.80 ≥11.50

Note:The data in the above table only represents typical or average data, just for reference in practical application. It does not bear any responsibility for the use of the product or related legal liability.

Package&Storage: Packed in plastic bag and corrugated paper; store at room temperature; avoid sunlight, moisture and fire. The storage period is 12 months.

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