Diamond Dotted 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, alias such as: epoxy adhesive diamond Paper, Diamond
Dotted Presspaper, Double sided Diamond Pattern Paper, DDPP, DPRCP, D.D.P, DPP,
Diamond Dotted Insulating Paper, Varnished Paper, etc.

It 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 degree C), The Diamond Dotted Paper 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 degree C, The Diamond
Dotted Paper begins one-off thaw and then one-off solidification. When to keep the
temperature at 90 degree 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
degree C (The value at least is equal to 0.275Mpa, America standard).

In pallet 







Callper (Inch)  0.003 0.005 0.007 0.01 0.015 0.02
            (millimotor) 0.076 0.127 0.178 0.254 0.381 0.508
  0.08 0.13 0.18 0.25 0.38 0.5
Thickness tolerance: \mm(10%) 0.005 0.013 0.018 0.025 0.038 0.05
Width tolerance \5mm,all thickness
Apparent density :g/cm3 0.9 to 1.1,all thickness
Moisture content,% 6.0 to 10.0%,all thickness 
PH water extract: 6.0 to 8.0, all thickness
Ash content,% 1% maximum
Elongation MD% 4
              CMD 9
No-pollution oil of transformer Non-pollution
Coating thickness per side   mm 0.006 to 0.012
Tensile strength ,N/mm2  
Machine direction: 90 90 80 90 92 95
Cross machine direction 30 25 35 35 35 35
Mullen burst strength:Min(Psi) 40 65 90 150 200 300
Dielectric breakdown: 750 1100 1700 2100 3000 3300
(volts/layer,dry test)
Dielectric breakdown: 5.5 8.5 10.5 14 20 23.5
(Kilovolts/layer,oil test)
Bond strength:Psi Minimum 40 Psi sheer strengh, tested at 100 degrees 450 Kpa







                                                                                      TJPFTZ L.X. INTERNATIONAL TRADING CO.,LTD.  
                                                   Add: Rm 801,Block C,Building 2,Xin Li Ja,Xin Wen Hua Garden,Fu'an st,He Ping District,Tianjin,China.
                                                                                    Post code: 300021
                                                               Tel: 0086-22-81330769  /27314832   /27307427       Fax: 0086-22-27314830