The 3240 and FR-4 are two common models of epoxy boards. There is also a lot of information on the Internet that FR-4 epoxy board is better than 3240. Where is the good place? I think a lot of friends who have just entered the business certainly don’t know for a while. To this end, I have specially compiled relevant information to help you recognize and distinguish these two materials.
Advantage 1: Good flame retardant performance.
It is the good product of 3240 epoxy board. The flame retardant properties of FR-4 epoxy board meet the national UL 94V-0 standard. This is beyond the reach of 3240.
Advantage 2: The color is pure.
Its color is very natural, and the color of the 3240 epoxy board is a bit blinking. It doesn’t look very natural. Most of the colors are not very uniform.
Advantage three: no radiation, environmental protection.
The 3240 epoxy board is halogen-containing and is not environmentally friendly to the environment and the human body. Nor is it in line with the country’s green sustainable development strategy. The FR-4 epoxy board is the opposite.
Advantage 4: Good dimensional stability.
This will not be affected by the influence of the environment, but also beneficial to people’s processing.
Advantage 5: Self-extinguishing from the fire.
This will reduce people’s losses to a minimum in the event of a fire.
Advantage 6: Low water absorption.
Its water absorption (D-24/23, plate thickness 1.6mm): ≤19mg, which is very helpful for its use in equipment such as wet transformers.
Because FR-4 epoxy board has good performance, it is now the material of choice for high-end electrical and electronic industry insulation components. Of course, 3240 epoxy board has a certain market due to its price advantage.