Diamond Dotted paper

Specifications Diamond Dotted Paper

Thickness(mm):0.08,0.13,0.18,0.25,0.38,0.50

Width (mm):500.625,810,960,1000,1100,1219,1300,

Diamond Dotted paper Material Name: Diamond Pattern Paper, Diamond Dotted Insulating Presspaper, Diamond Dotted paper, DDP, Double Sided Dimaond Pattern Paper, DDPP, DPRCP, Diamond Pattern Resin Coated Paper,Varnished Paper Epoxy Adhesive Diamond Paper,Etc.   1.Process of producing Diamond pattern paper made of Kraft paper coated with heat curable epoxy resin.The epoxy adhesive is applied to both sides of the paper in a diamond pattern consisting of 9.5mm x9.5mm diamonds with 15.9mm center spacing. The Diamond dotted Paper is to be used in oil-immersed transformers for the insulation between of coils. On the insulation layer, there is a layer dotted epoxy resin that will be changed with high temperature change that is to be called as felt.It is a kind of material with inertia, dry and no conglutination at normal temperature (below 30°C), The Diamond Dotted Paper (DDP)will make the electric conductor forever felt up as a hard unit under the high temperature by its internal latency substance. When the temperature is rising up to 90°C, The Diamond Pattern Paper (DDP)begins one-off thaw and then one-off solidification. When to keep the temperature at 90°C for 90 minutes, the epoxy resin would paste on neighboring cable and paper safely. The felt intensity is as high as to 70psl at 100°C.(The value at least is equal to 0.450Mpa) (IEC standard)     2.  Testing:      

Caliper:(inch)        (millimeter)	0.003 0.08	0.005 0.13		0.007 0.18	0.010 0.25		0.015 0.38	0.020 0.50
Thickness tolerance:±mm (±10%)	0.005	0.013		0.018	0.025		0.038	0.05
Width tolerance:	±5mm,all thicknesses
Apparent density: g/cm3	0.9 to 1.1, all thicknesses
Moisture content ,%	6.0 to 10.0%, all thicknesses
PH water extract:	6.0 to 8.0, all thicknesses
Ash content,%	1% maximum
Elongation  MD  %            CMD	4 9
No-pollution oil of transformer	Non-pollution
Coating thickness per side mm	0.006 to 0.012
Tear strength, g  Machine direction:  Cross machine direction:	55 70	100 145	140 210			220 370	410 600	440 700
Tensile strength,N/mm2  Machine direction:  Cross machine direction:	90 30	90 25	80 35			90 35	92 35	95 35
Mullen burst strength: min (Psi)	40	65	90			150	200	300
Dielectric breakdown:  (volts/layer ,dry test)	750	1300	1700			2100	3000	3300
Dielectric breakdown  (kilovolts/layer, oil test)	5.5	8.5	10.5			14.0	20.0	23.5
Bond strength: Psi Kpa	Minimum 40 psi shear strength, tested at 100 degrees  450kpa

  All date shown represents Nominal, or Typical Values only and should not be construed as minimum or maximum values unless specifically stated.   3. Packing and Store Dimensions: Thickness(mm):0.08,0.13,0.18,0.25,0.38,0.50 Width    (mm):500.625,810,960,1000,1100,1219,1300, We also can produce Width of DDP according to customer’s requirements Reel Diameter:                               300-360mm Can Core Diameter                         76±2mm Store condition: Should store , in do not exceed 35° is dryed , clean with ventilate good
                               place, must not avoid sunlight near fiery source and warm wind direct.  
Storage time: 12 months under normal temperature.       4. Application field:                                                           Suitable for winding coils of oil-immersed transformers.

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Product Categories : Transformer Duct Strip