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Fr-4 and 3240 are the two most common epoxy plates currently on the market.Everyone says the fr-4 epoxy is better than the 3240 epoxy.What's the difference between them?

FR4 has good flame retardant performance.

FR4 is an improvement on the 3240 epoxy plate.The flame retardant properties of fr-4 epoxy plates meet the national UL 94v-0 standard.The 3240 epoxy plate has no flame retardant properties.

Colour and lustre is clear.

The color of the FR4 is very natural, a little jade-like, while the color of the 3240 epoxy is a little winky.It doesn't look very natural.The colors are mostly uneven.

FR4 no radiation, environmental protection.

The 3240 epoxy plate contains halogen, which is not very environmentally friendly for the environment and human body.It is also not in line with the country's green and sustainable development strategy.The fr-4 epoxy plate is the opposite.

FR4 has good dimensional stability.

The dimensional stability of FR4 is better than that of 3240, and the thickness tolerance of FR4 is much better than that of 3240 during the pressing process, which is more suitable for machining.

FR4 can leave the fire from extinguish.

FR4 can be extinguished naturally in case of fire.

Less water absorption.

Its water absorption (d-24/23, plate thickness 1.6mm) :≤19mg, which provides a good help for its use in wet transformers and other equipment.

Because of its excellent performance, fr-4 epoxy board is now the preferred material for insulation components in high-end electrical and electronic industries.Of course, there is still a certain market for 3240 epoxy plate because of its price advantage.