Ⅰ Brief instruction：
WL-4009A/B is
two-component Polyurethane casting system, have the properties
of good thermal shock resistance, excellent electric properties,
and low water absorption.
|
Ⅱ Product Data：
|
Item
|
Method
|
|
4009B
|
|
Appearance
|
Visual
|
yellowish Viscous Liquid
|
Buff Viscous
|
|
Viscosity
|
25℃ mpa·s
|
100~300
|
600~1000
|
|
Density
|
25℃ g/ml
|
1.2
|
0.95
|
|
Shelf-life
|
R.T.
|
3 months
|
3 months
|
Ⅲ Work Process:
|
Item
|
Unit or Condition
|
|
|
Mixing Proportion
|
Weight Proportion
|
50:100
|
|
|
25℃，min
|
|
|
|
℃/hrs
|
60/3 or 25/24
|
* Time to
reach 5000 mPa·s
Ⅳ Application：
Used
for casting of electric unit such as transformers, capacitors、filters
etc。
Ⅴ Work method:
a)
Preheating：The unit
preheat at 70~80℃for 1~2hour to remove humidity；
b)
Mixing：Weight A and B by mix ratio and mix thoroughly;
c)
Degassing：Degas the mixture B by vacuum;
d)
casting：Cast the degassed mixture into the preheated unit。
Ⅵ Properties of
Cured System：
|
Item
|
|
|
|
Hardness
|
Shore-A
|
60~90
|
|
Volume Resistance
|
25℃，Ω·cm
|
1.0×1013
|
|
Insulation Strength
|
25℃，kV/mm
|
22.4
|
|
Water Absorption
|
24h, 25℃，%
|
<0.3
|
Ⅶ Storage：
Store
the components in a dry place at 18-25℃,in
tightly sealed original containers. Under these conditions, the
shelf
life will correspond to the expiry date stated on the Label. After
this date, the product may be processed
only
after reanalysis. Partly emptied containers should be tightly closed
immediately after use
Ⅷ Packing：
25Kg Metal Container
※
Remarks:
The
above technical data are typical product data at 70% humidity and 25
degree C, for customer reference only.
