- Source: FR-2
- Source: FR2
FR-2 (Flame Resistant 2) is a NEMA designation for synthetic resin bonded paper, a composite material made of paper impregnated with a plasticized phenol formaldehyde resin, used in the manufacture of printed circuit boards. Its main properties are similar to NEMA grade XXXP (MIL-P-3115) material, and can be substituted for the latter in many applications.
Applications
FR-2 sheet with copper foil lamination on one or both sides is widely used to build low-end consumer electronic equipment. While its electrical and mechanical properties are inferior to those of epoxy-bonded fiberglass, FR-4, it is significantly cheaper. It is not suitable for devices installed in vehicles, as continuous vibration can make cracks propagate, causing hairline fractures in copper circuit traces. Without copper foil lamination, FR-2 is sometimes used for simple structural shapes and electrical insulation.
Properties
Fabrication
FR-2 can be machined by drilling, sawing, milling and hot punching. Cold punching and shearing are not recommended, as they leave a ragged edge and tend to cause cracking. Tools made of high-speed steel can be used, although tungsten carbide tooling is preferred for high volume production.
Adequate ventilation or respiration protection are mandatory during high-speed machining, as it gives off toxic vapors.
Trade names and synonyms
Carta
Haefelyt
Lamitex
Paxolin, Paxoline
Pertinax, taken over by Lamitec and Dr. Dietrich Müller GmbH in 2014
Getinax (in the Ex-USSR)
Phenolic paper
Preßzell
Repelit
Synthetic resin bonded paper (SRBP)
Turbonit
Veroboard
Wahnerit
See also
Formica (plastic)
Micarta
References
Further reading
Industrial Laminated Thermosetting Products. National Electrical Manufacturers Association (NEMA). 2012-02-01 [2011, 1998]. NEMA LI 1-1998 (R2011).
FR2 may refer to:
Forschungsreaktor 2, the first entirely German-built nuclear research reactor
Fostex, Field Memory Recorder (FR-2)
France 2, a French public TV network
FR2 (Lazio regional railways), a rail network in the Rome area
FR-2, synthetic resin bonded paper, often used in electronics
FR2, a Japanese fashion brand owned by Ceno Company
Frequency Range 2, one of the 5G NR frequency bands
Kata Kunci Pencarian:
- FINLAY-FR-2
- ISO 3166-2:FR
- (465824) 2010 FR
- 2009 FR
- Prancis
- Fransium
- Logam alkali tanah
- Toyota 86
- FDJ.fr
- Helium
- FR-2
- FR
- .fr
- ISO 3166-2:FR
- FR-4
- Ryan FR Fireball
- Fr Fr
- Kalan.FrFr
- FR2
- FR F1
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