4500A (P) / 4500B (P) system-component packaging materials, insulation, low stress, good resistance to thermal shock characteristics and stable electrical performance at room temperature or low temperature curing.
Second, the conventional performance:
Test Project
Testing methods or conditions
4500A (P)
4500B (P)
Appearance
Head Measurement
Light yellow liquid
Specify color or black viscous liquid
Viscosity
25 ℃ mPa · s
100 ± 50
3000 ± 500
Density
25 ℃, g / ml
1.20 ± 0.05
1.50 ± 0.05
Shelf life
Sealed at room temperature
Six months
Six months
Third, the use of technology:
Item
Units or conditions
4500A (P) / 4500B (P)
Mixing ratio
Weight ratio
16 ~ 17:100
Applicable period *
25 ℃, min
20 ~ 30
Curing conditions
℃ / h
60 / 3 ~ 4 or 25/24
* For date of the 5Pa · S.
Fourth, use:
For the potting medium and small electronic components, such as: capacitors, transformers, ignition controllers, filters and so on.
Five recommended process:
1 Preheat: Please be pouring device 70 ~ 80 ℃ bake 1 to 2 hours. But also can reduce the temperature and prolonged heating to remove the device moisture.
4500 (P) A / B at low temperature, the viscosity becomes high, A crystalline material is easy. Please preheated material to 25 ℃ ~ 45 ℃. Easy to use.
2, B agents during storage or a small amount of precipitation will be layered, please mix well before use.
3, mixed: weighing in proportion to A, B material, agitation, vertical mixing stick, clockwise (or counterclockwise) with the direction of stirring 2 to 3 minutes to minimize the stirred into the air. Note that the bottom of the container, but also stir the edge of the Ministry of Otherwise, there will be no partial curing phenomenon.
4, deaeration: requirements for the smooth surface without air bubbles encapsulating those stirring mixture should be vacuum (≤-0.1mpa) smooth off the bubble. Potting mix were measured by mechanical, omit steps 3,4.
5, the casting: the mixture poured into the device, the device structure is complex, bulky, shall be graded casting. Pouring hot air gun blowing bubbles available. Eliminate the surface buoy.
6, curing: 25 ℃ / 48h, or 60 ℃ / 3 ~ 4h. Can be cured. Low temperature curing time should be extended as appropriate. This product is sensitive to moisture, moisture can cause blistering cure. Operating environment Recommended control 23 ± 3 ℃, relative humidity "70%.
Sixth, after curing characteristics:
Project
Units or conditions
4500A (P) / 4500B (P)
Hardness
Shore-D/Shore-A, 25 ℃
40 ± 5 / 75 ± 10
Water absorption
24h, 25 ℃%
<0.3
Volume resistivity
Ω · cm
> 1 × 1014
Surface Resistivity
Ω
> 1 × 1014
Tensile strength
Mpa
> 3
Elongation
100%
> 50
Flame retardant
UL-94
V-0
Dielectric Strength
KV / mm
> 20
Application temperature range #
℃
-40 ~ 130 (Class B)
# Maximum working temperature is obtained under a valid result. The final device structure using the temperature must be determined by the heat level. Level B has been tested temperature (IEC 60216 / IEC 60085).
VII, storage, transportation and precautions:
A non-dangerous goods such products, as a general chemical storage, drum storage period see.
2 at room temperature (5 ~ 35 ℃) and humidity (45 ~ 85% RH), dark dark seal, storage.
3 Please use the sights of the product model, then the condemnation; accurate weighing, please, stir.
VIII, packaging specifications:
A metal container 20KG packaging materials; B 25KG metal containers for the packaging material.
* Note: The above performance data for the product in 70% humidity, temperature 25 ℃, the typical test data for reference purposes only customers, and can not guarantee that a particular environment can be achieved when all the data. Please use customers, subject to the measured data.
