Special two componentpolyurethane adhesive glue for metal sheet
According to their properties, uses, distribution and reserves, many non-ferrous metals can be divided into four categories: heavy metals, light metals, precious metals and rare metals. The commonly used heavy metals are copper, lead, zinc and tin, the commonly used light metals are aluminum, magnesium, sodium, calcium and potassium, the commonly used precious metals are gold and silver, and the commonly used rare metals are divided into rare light metals, rare high melting point metals, rare scattered metals, rare earth metals and rare radioactive metals. In use: One component polyurethane adhesive can be used for manual gluing, and One component polyurethane adhesive (special for mechanical spraying) can be used for mechanical gluing. 4:1 two component polyurethane adhesive or 5:1 two component polyurethane adhesives can be used when the air humidity and room temperature are low or the bonding strength is high and the bonding is flat.
Product Description
4141(WCH2-1)
Two component polyurethane adhesive
Parameter
A component
B component
Before mixing
Appearance
White viscous liquid
Brown liquid
Density [g/cm3]
1.25±0.1
1.22 1.24
After mixing
Mixing ratio
4
1
Initial setting stage
30Minute
Curing time
7hour
Initial viscous formation
5 to 8 hours at room temperature
Ultimate viscous formation
5 to 7 days at room temperature
Full cure
7 days later
Test results (unit Mpa, aluminium/aluminium bonding):
1. Tensile Strength Change during Curing (25℃)
First day
The second day
The forth day
Seventh days
8.1
9.4
10.5
13.7
2. The curing process at other temperatures (room temperature is recommended)
temperature
Curing Strength (When Components Return to Normal Temperature)
73℃ below zero
24
25℃
13.7
50℃
12
70℃
8.2
100℃
8
Remarks:In the curing process, if a certain pressure is added, the effect will be better and the best bonding strength will be achieved.
