Diamond Dotted insulation paper
Name of goods:
Diamond Pattern Paper, Diamond Dotted Insulating Presspaper, Diamond Dotted paper, DDP, Double Sided Diamond Pattern Resin Coated Paper
Dimensions
Thickness(mm) ---0.08mm, 0.13mm ,0.18mm , 0.20mm 0.25mm ,0.35mm ,0.40mm
Width (mm)---.625 ,960,1000,1020,1250
We also can produce Width of DDP according to customer's requirements
Roll Diameter--- 280-330mm
Core Diameter --- 76±2mm
Diamond pattern adhesive insulating paper is a type of insulation material coating special modified epoxy resin one electrical insulating materials. It is widely applied in inter-layer insulation and turn insulation of oil-immersed power transformers. During application the coated layer starts to melt under certain temperature in the process of coildrying and results in adhesion effect. As temperature rises, it starts to solidify and makes coils' adjacent layers reliably bond into a fixed unit. The adhesive strength of epoxy resin is strong enough to prevent the displacement of coil layers in case of short-circuit. so as to ensure the long-term mechanical and electrical performance of insulation structure
Product Solidification conditions: firstly ,temperature rises to 125±5ºC after maintaining 90±5ºC for three hours and then the product completely solidifies after maintaining for six fours
ITEM | TYPICAL VALUES | MATTER OF FACT |
Caliper: (inch) (millimeter) | 0.007 0.178 | |
Thickness: mm | 0.18±0.018mm+0.01 | 0.187 (0.186,0.189,0.185) |
Width: mm | 1220±5mm | 1219-1222 |
Apparent density: g/cm3 | 0.97-1.05 | 1.01 |
Moisture content , | 4.0 to 8.0 | 4.66 |
PH water extract: | 6.5 to 8.5 | 7.75 |
Elongation MD CMD | ≥2.0 ≥5.4 | 2.8 8.5 |
Edge Internal tearing resistance N Machine direction: Cross machine direction | 63.5 70.3 | |
Tear strength, MN Machine direction: Cross machine direction: | ≥1350 ≥1500 | 2240 2600 |
Conductivity of aqueous extract Ms/m | ≤8.0 | 6.7 |
Ash content, maximum | ≤0.7 | 0.55 |
Coating thickness per side mm | 0.006 to 0.012 | 0.011 |
Tensile strength, N/mm2 Machine direction: Cross machine direction: | 80 35 | 87.6 49.6 |
Dielectric breakdown: (volts/layer ,dry test) | ≥1400 | 1653 (1680,1660,1620) |
Bond strength: Kpa | 450kpa | 726 |