PU packaging materials 4500A (-1) / 4500B (-1) flexible potting compound

4500A (-1) / 4500B (-1), Department of two-component packaging materials, has excellent impact resistance properties, weather resistance, electrical performance and low absorption rate.

Second, the conventional performance:

Test Project
 Testing methods or conditions
 4500A (-1)
 4500B (-1)
 
Appearance
 Head Measurement
 Brown liquid
 Black liquid
 
Viscosity
 25 ℃ mPa · s
 100 ± 50
 3000 ± 1000
 
Density
 25 ℃, g / ml
 1.20 ± 0.05
 1.55 ± 0.05
 
Shelf life
 Sealed at room temperature
 Six months
 Six months
 

Third, the use of technology:

Item
 Units or conditions
 4500A (-1) / 4500B (-1)
 
Mixing ratio
 Weight ratio
 50:100
 
Mixed viscosity
 25 ℃, mPa · s
 1000 ± 300
 
Mixed density
 25 ℃, g / ml
 1.40 ± 0.05
 
Applicable period *
 40 ℃, min
 > 40
 
Curing conditions
 ℃ / h
 60 / 3 ~ 4 or 25/48
 

* For date of the 5Pa · S.

Fourth, the proposed use of technology:

1 Preheat: The casting device 70 ~ 80 ℃ Please bake 1 to 2 hours. But also can reduce the temperature and prolonged heating to remove the device moisture. 4500 (-1) 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%.

Fifth, use:

For the potting medium and small electronic components, such as: ignition capacitors.

Sixth, after curing characteristics:

Project
 Units or conditions
 4500A (-1) / 4500B (-1)
 
Hardness
 Shore-A
 75 ± 5
 
Water absorption
 24h, 25 ℃%
 <0.3
 
Volume resistivity
 Ω · cm
 > 1.0 × 1013
 
Flame retardant
 UL-94, 1/16in thick
 V-0
 
Elongation
 %
 200 ± 50
 
Dielectric Strength
 KV / mm
 > 20
 

VII, storage, transportation and precautions:

Such products of non-dangerous goods, as a general chemical storage and transportation, storage period, see drum.

Room temperature (5 ~ 35 ℃) and humidity (45 ~ 85% RH), dark dark seal, storage.

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.