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 mangrupikeun standar matérial anu ditetepkeun ku Asosiasi Pabrik Listrik Amérika. Standar IEC anu cocog nyaéta EPGC202. Teu aya standar domestik anu saluyu sareng éta.

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. Rupa-rupa wujud. Rupa-rupa résin, agén curing, sareng sistem modifier ampir tiasa adaptasi sareng sarat sababaraha aplikasi dina bentuk, sareng kisaranna tiasa tina viskositas anu handap pisan kana padet titik lebur anu luhur.

2. Ngubaran anu merenah. Pilih rupa-rupa agén pangobatan anu béda, sistem résin epoxy ampir tiasa diubaran dina kisaran suhu 0 ~ 180.

3. kuat adhesi. Kelompok hidroksil polar alamiah sareng beungkeut éter dina ranté molekul résin epoksi ngajantenkeun napel pisan kana sagala rupa zat. Nyusut résin epoxy kirang nalika ngubaran, sareng setrés internal anu dihasilkeun alit, anu ogé ngabantosan ningkatkeun kakuatan adhesion.

4. Lemes nyusutan. Réaksi antara résin epoxy sareng agén pangubaran anu dilakukeun dilaksanakeun ku réaksi tambihan langsung atanapi réaksi polimérisasi cincin-épék tina gugus époksi dina molekul résin, sareng henteu aya cai atanapi hasil sampingan anu teu stabil anu dileupaskeun. Dibandingkeun sareng résin poliéster henteu jenuh sareng résin fenolik, éta nunjukkeun panyusutan anu handap pisan (kirang ti 2%) nalika diubaran.

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