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 ndichikhalidwe chomwe chimafotokozedwa ndi American Electrical Manufacturers Association. Mulingo wofananira wa IEC ndi EPGC202. Palibe mulingo wapanyumba wofanana nawo.

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. Mitundu yosiyanasiyana. Ma resin osiyanasiyana, othandizira kuchiritsa, ndi makina osinthira amatha kusintha kutengera zofunikira zosiyanasiyana pafomuyi, ndipo mitunduyi imatha kukhala yochokera pa mamasukidwe akayendedwe otsika mpaka zolimba kwambiri.

2. Kuchiritsa bwino. Sankhani mitundu yosiyanasiyana ya othandizira akuchiritsa, dongosolo la epoxy resin limatha kuchiritsidwa pamatenthedwe a 0 ~ 180 ℃.

3. Kumangiriza mwamphamvu. Magulu abwinobwino a polar hydroxyl ndi ma ether omwe amakhala munthawi yamagulu a epoxy resin amawamatira kwambiri pazinthu zosiyanasiyana. Kuchepetsa kwa epoxy resin kumakhala kotsika pochiritsa, ndipo kupsinjika kwamkati komwe kumachitika ndikochepa, komwe kumathandizanso kukulitsa mphamvu yolumikizira.

4. Kutsika pang’ono. Zomwe zimachitika pakati pa epoxy resin ndi wothandizira omwe amagwiritsidwa ntchito zimachitika ndikuwonjezera mwachindunji kapena kutsegulira mphete magulu a epoxy mu molekyulu ya utomoni, ndipo palibe madzi kapena zinthu zina zosakhazikika zomwe zimatulutsidwa. Poyerekeza ndi ma resin a polyester osakwaniritsidwa komanso ma phenolic resins, amawonetsa kuchepa kwambiri (ochepera 2%) pakachiritsa.

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