What is the difference between FR-4 and 3240? Coming up, Newlytrend Industrial Co., Limited's expert will analyze the difference between FR-4 and 3240 for you.

1. Product introduction

FR-4 epoxy sheet is made by good electronic leaching with non-alkali glass fiber cloth with epoxy resin, the thermal processing of rigid plate insulation materials. It has better performance on the mechanical strength, thermal performance. 3240 epoxy sheet is made by non-alkali glass fiber cloth (electrician level) dipped in epoxy resin and phenolic resin, via thermal processing to come out this rigid insulation sheet.

2. The product features

FR-4 products with excellent machining performance; Excellent low water absorption, bibulous rate is almost zero, flooding after 24 hours, absorption rate is: 0.09%.Good dielectric strength, chemical resistance, radiation resistance and thermal shock resistance; Good tensile strength, flexural strength and low temperature performance; Both in wet or dry conditions, FR-4 epoxy sheet has good electrical properties and the characteristics of the electrical performance loss is small. Also, FR-4 epoxy has very good the flame retardance and heat resistance.

3240 epoxy sheet has a certain electrical insulating performance.

3. Product color comparison

The natural color of FR-4 epoxy sheet is yellow, the same as the color of pure epoxy resin. After thermosetting molding, due to the outcome time is different; the color will have some differences in depth, but does not affect the product performance.3240 epoxy is just as normal yellow.

4. The comprehensive performance comparison of high strength FR-4 fiberglass epoxy sheet and 3240 phenolic epoxy glass cloth laminated sheet.

1). The breakdown voltage and Vertical layer to the dielectric strength of 3240 phenolic epoxy glass cloth laminated sheet is low, so after flooding, its insulation resistance is relatively small, but the intensity is kind of low.

2). When processed into insulation fixed parts especially complex shape pieces, if processing surface processes improper, 3240 epoxy sheet is easy absorption of moisture and cause delamination phenomenon. It will lead to parallel layer with low electric resistance, affect the quality of the product. When FR-4 epoxy sheet processed into insulation fixing parts, its processing surface is smooth, not easy to come into being delamination phenomenon, so the product quality is stable.

3). FR-4 epoxy sheet has a heat-resisting performance; its continuous working temperature can reach 150 ° C. FR-4 epoxy sheet has good flame retardant and can meet the standard of UL 94V0 level.

4). The flame retardant performance of 3240 epoxy sheet is very low, so cannot meet the standard of UL 94V0 level.

5). The thickness tolerance of 3240 epoxy sheet is larger than FR-4 epoxy sheet, sometimes cannot meet the high requirements of some electronic products, but FR-4 epoxy sheet can.

6). The great advantage of 3240 epoxy sheet over FR-4 epoxy sheet is that the price of 3240 epoxy sheet is much lower than FR-4 epoxy sheet.

5. The environmental protection comparison

FR-4 products can meet ROHS environmental protection requirements but 3240 products cannot.

The differences between FR-4 and 3240 are more than the above five points, but these points are the most important one.

FR-4 Epoxy Sheet

FR-4 Copper Clad Laminate:

Edit by Newlytrend Industrial Co., Limited

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