Ⅱ.Product
data
|
Item |
Test method or condition |
WL-800A |
WL-800B |
|
Appearance |
Visual inspection |
Light purple transparent liquid |
Colorless
transparent liquid |
|
Density |
25℃
g/cm3 |
1.1-1.2 |
1.15-1.20 |
|
Viscosity |
40℃
cPs |
800-1300 |
30-60 |
|
Shelf life |
Room temperature, ventilation |
Half a year |
Half a year |
Ⅲ.
Working condition
|
Item |
Unit or condition |
WL-800A/B |
|
Mixing
proportion |
In weight |
100:100 |
|
Application
time period |
40℃,35g,h |
>3.5 |
|
Curing
condition |
℃/h |
Mould
releasing:110-150℃/60-20min;
Recommend:130℃/35min.
Aging:100-120℃/6-8h. |
1.
Recommended quantity (in weight) of diffusing agent
and color paste to be used with WL-800A/B:
PC-002 2-5%
PC-003 1-3%
PC-004 2-4%
Diffusing agent 2-5%
2.
Before use, material A is to be pre-warmed to 40-50℃,
then add material B in proportion and mix them thoroughly.
3.
The mixture (A+B)is to be vacuum degassed at 3 torr
and 40℃.
When the liquid level sinks for 10-15 minutes stop
degassing.
4.
the encapsulated parts should be pre-heated at 70-90℃
for 1 hour to remove moisture.
5.
If possible encapsulation parts should be carried out
in vacuum.
Ⅳ.Applications
Used in
encapsulating of transparent LED and other optical
semi-conductor device..
Ⅴ.Characteristics
after curing
|
Items |
Unit or condition |
WL-800A/B |
|
Hardness |
Shore-D |
>88 |
|
Volume
resistivity |
25℃,Ω·cm |
>1015 |
|
Surface
resistance |
25℃,Ω |
>1014 |
|
Insulation
strength |
25℃,KV/mm |
>23 |
|
Linear
expansion coefficient |
cm/cm/℃ |
<6.0×10-5 |
|
Water
absorption |
100℃/1h,% |
<0.35 |
|
Tg value |
℃ |
>130 |
Ⅵ.Storage,
transportation and points to note
1.
This product does not belong to dangerous article. It
can be stored and transported in the way as common chemicals
do. The shelf life is designated in the container.
2.
Material B is liable to absorb moisture, the lid of
the container must be tightly covered after use.
Ⅶ.Packing
Packed in 6-kg
plastic container. Company symbol at the side of container.
Ú
Note: The data above are typical tested at a relative
humidity of 70 % and a temperature of 25℃.
They are just for customers’ reference. We cannot wholly
guarantee all the listed data will be reached under specific
test conditions. When applying the product, the customers
should use data obtained through their own testing.
