Ⅰ、Brief
instruction
WL-4050A/B is two-component PU casting system, it has excellent
low temperature properties, good electric properties, water
resistance and low water absorption。
|
Ⅱ、Product
data：
|
Item |
Unit or condition |
WL-4050A/B |
|
Appearence |
A |
Visual |
Pale yellow
transparent liquid |
|
B |
Light yellow liquid |
|
Viscosity |
A |
25℃
mPa·s |
350±50 |
|
B |
110±10 |
|
A+B |
200±50 |
|
Density |
A |
25℃
g/cm3 |
1.15±0.05 |
|
B |
0.95±0.05 |
|
Pot life |
25℃
min |
20~40 (to10000mPa·s) |
|
Mixing proportion |
Weight proportion |
A
：B=75±2
：100 |
|
Curing schedule |
℃/h |
60℃/3h
or 25℃/24h |
|
Shelf life |
R.T.Sealed |
3 months |
Ⅲ、Properties
of cured system：
|
Item |
Unit or condition |
|
|
Hardness |
Shore-A |
30±5 |
|
Volume resistivity |
25℃，Ω·cm |
>1013 |
|
Water absorption |
24hrs, 25℃，% |
<0.3 |
|
Insulation strength |
25℃，kV/mm |
>20 |
|
Tear elongation |
% |
>150 |
|
Combustibility |
UL94 V-0 |
equivalent |
Ⅳ、Application：
Used for casting of electric
units such as electrical portfire controller、IC
board etc.
Ⅴ、Work
method：
1．
Porheating：The
units proheat at 70~80℃
for 1~2h to remove humidity；
2．
Mixing：Weight
A and B by mix ratio and mix throughly；
3．
Degassing：Degas
the mixture by vacuum；
4．
Casting：Cast
the degassed mixture into the preheated units。
Ⅵ、Points
to note
〔Control
and Protective measures〕
Protective clothing
needed
Protective gloves
must
Raglan sleeves
needed when skin contact exist
Goggles
needed
Gas mask/Dust proof cover
not needed
〔Skin
protection〕
Before applying
use ointment on naked skin
After applying
use protect oil or nutrient oil
Cleaning of contacted skin
wipe the material from skin with absorbent paper then wash with warm
water and alkali-free soap ,do not use solvent.
〔Workplace
cleaning〕
Cover the worktable with light colour paper, use one-off beaker。
〔Accidental
release measures〕
Soak up with waste cotton or saw dust and deposit in plastic-lined bin
〔Ventilating
measures〕
Workshop
Ventilate often
Workaround
Equipped with ventilator ,avoid breathing in the vapor
Ⅶ、Packaging：
Component A: 20 Kg Metal container Component B: 18 Kg 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.
Contact Mode:
Mr. Angus Jin Mail:
jys88@163.com
