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 minangka standar materi sing ditemtokake dening Asosiasi Pabrik Listrik Amerika. Standar IEC sing cocog yaiku EPGC202. Ora ana standar domestik sing cocog.

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. Maneka warna wujud. Macem-macem resin, agen tamba, lan sistem modifikasi meh bisa adaptasi karo macem-macem aplikasi ing formulir kasebut, lan kisaran bisa saka viskositas sing sithik banget nganti padatan titik leleh sing dhuwur.

2. Ngobati sing gampang. Pilih macem-macem agen obat sing beda, sistem resin epoksi meh bisa mari ing kisaran suhu 0 ~ 180.

3. Adhesi sing kuwat. Klompok hidroksil polar sing ana gandhengane lan ikatan eter ing rantai molekul resin epoksi nggawe adhesif banget karo macem-macem zat. Penyusutan resin epoksi kurang nalika ngobati, lan stres internal sing digawe sithik, sing uga bisa nambah kekuatan adhesi.

4. Susut sithik. Reaksi antarane resin epoksi lan agen obat sing digunakake ditindakake kanthi reaksi tambahan langsung utawa reaksi polimerisasi pembukaan dering saka klompok epoksi ing molekul resin, lan ora ana banyu utawa produk sampingan liyane sing diluncurake. Dibandhingake karo resin poliester sing ora jenuh lan resin fenolik, umume nyusut banget (kurang saka 2%) sajrone ngobati.

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