What is the difference between 3240 epoxy board and FR4環氧板?

1. Translucent color.

FR4環氧板的顏色很自然，有點翡翠，3240環氧板的顏色有點閃爍。 看起來不是很自然。 大多數顏色不是很均勻。

2. FR4 has good flame retardant performance.

FR4 is an improved product of 3240 epoxy resin board. The flame retardant performance of FR4 epoxy board meets the national UL94V-0 standard. 3240 epoxy resin board has no flame retardant properties.

3. FR4 is non-radiation and environmentally friendly.

3240 epoxy resin board is halogen-containing, which is not very environmentally friendly to the environment and the human body. It also does not conform to the country’s green sustainable development strategy. The FR4 epoxy board is just the opposite.

4. FR4 can self-extinguish from the fire.

發生火災時，FR4 可以自然熄滅。

5. FR4 has good dimensional stability.

FR4的尺寸穩定性比3240好，在壓製過程中，FR4的厚度公差也比3240好很多，更適合加工。

6. 吸水率低。

其吸水率（D-24/23，板厚1.6mm）：≤19mg，為濕式變壓器等設備的使用提供了很好的幫助。