DDP Dimond 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 X 9.5mm 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)