The meaning of FR4 in FR4 epoxy glass fiber board

FR4 is a code for the grade of flame-retardant materials. It represents a material specification that the resin material must be able to extinguish by itself after burning. It is not a material name, but a material grade. Therefore, it is currently used in general circuit boards. There are many types of FR-4 grade materials, but most of them are composite materials made of so-called Tera-Function epoxy resin, Filler and glass fiber.

NEMA is ‘n materiële standaard wat deur die American Electrical Manufacturers Association bepaal word. Die ooreenstemmende IEC -standaard is EPGC202. Daar is geen huishoudelike standaard wat daarmee ooreenstem nie.

The closest domestic standard is 3240 epoxy laminated glass cloth board. The corresponding IEC standard of 3240 is EPGC201, and there is only a difference in flame retardancy between EPGC201 and EPGC202. Therefore, it can be simply considered that FR-4 is an improved product of 3240 with enhanced flame retardancy.

FR4 epoxy glass fiber board, the main material is imported prepreg. The colors are white, yellow and green. It still has high mechanical strength at room temperature of 150℃. It has good electrical performance in dry and wet state, flame retardant, used in electrical and electronic Insulation structural parts in other industries are carefully manufactured with imported raw materials, domestic presses and standard technology; the main specifications are 1000*2000 mm 1020mm*1220mm, because of the advantages of raw materials, it guarantees high quality, low price, and timely delivery. It has a solid customer base at home and abroad and enjoys a high reputation.

Application characteristics sharing of FR4 epoxy glass fiber board

1. Verskeie vorme. Verskillende harse, verhardingsmiddels en modifikasiestelsels kan byna aanpas by die vereistes van verskillende toepassings op die vorm, en die reeks kan wees van baie lae viskositeit tot vaste smeltpunte.

2. Gerieflike genesing. Kies ‘n verskeidenheid verskillende geneesmiddels; die epoksiedharsstelsel kan byna genees word in die temperatuurbereik van 0 ~ 180 ℃.

3. Sterk adhesie. Die inherente polêre hidroksielgroepe en eterbindings in die molekulêre ketting van epoksieharsen maak dit baie kleefbaar aan verskillende stowwe. Die krimp van epoksihars is laag tydens uitharding, en die interne spanning wat ontstaan, is klein, wat ook help om die hechtsterkte te verbeter.

4. Lae krimp. Die reaksie tussen die epoksiehars en die gebruikte geneesmiddel word uitgevoer deur ‘n direkte addisiereaksie of ‘n ringopenende polimerisasiereaksie van epoksiegroepe in die harsmolekule, en geen water of ander vlugtige byprodukte word vrygestel nie. In vergelyking met onversadigde polyesterhars en fenolhars, toon hulle baie lae krimp (minder as 2%) tydens uitharding.

1. Mechanical properties. The cured epoxy resin system has excellent mechanical properties.