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The difference between FR-4 epoxy plate and 3240 epoxy plate

Popularity:1166Publication time:2017-08-15
3240 and FR4 are the most common two epoxy plates used in the market. Everyone said  FR-4 epoxy plateGood than 3240. What is the difference between them?

Difference 1: FR4 flame retardant performance is good.

FR4 is a modified product of 3240 epoxy plates. The flame retardant performance of the FR-4 epoxy sheet complies with the national UL 94V-0 standard. The 3240 epoxy plate has no flame retardant performance.
Difference two: translucent color.
The color of FR4 is nature, a bit of jade feel, and the color of the 3240 epoxide plate is a bit blink. It seems not very nature. Most of the color is not very uniform.
Difference three: FR4 no radiation, environmentally friendly.
3240 epoxy plates are halogen-containing, for the environment, the human body is not very environmentally friendly. It does not comply with the national green sustainable development strategy. The FR-4 epoxy plate is just the opposite.
Difference four: FR4 size stability is good.
The FR4 dimensional stability is better than 3240, and the thickness tolerance control of FR4 is much better than 3240 during the pressing process, and is suitable for processing.
Difference 5: FR4 can be extinguished from fire.
FR4 can have naturally extinguished functions when there is a fire.
Differenceary 6: Small water absorption.
Its water absorption (D-24/23, plate thickness 1.6mm): ≤19mg, which provides a good help in equipment such as moist transformers.
Because the FR-4 epoxy plate has good performance, it is now preferred materials for high-end electrical, electronic industry insulation components. Of course, the 3240 epoxy plate has a certain market due to its advantage of its price.