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Fiber Reinforced plastics are rigid sheets laminated using thermosetting (epoxy) resins and fiberglass fabric.
Characterized by high dielectric strength, excellent mechanical and thermal properties and good flexural strength.
Have good machinablity and punchability
Ideally suited for wedging applications, as interlayer insulation in electromagnets, as terminal plates & separators in switchgears. |
| A PCB needs to be an insulator to avoid shorting the circuit, physically strong to protect the copper tracks placed upon it, and to have certain other physical electrical qualities. FR-4 is preferred over cheaper alternatives such as synthetic resin bonded paper (SRBP, FR-1 and FR-2) due to several mechanical and electrical properties; it is less glossy at high frequencies, absorbs less moisture, has greater strength and stiffness and is highly flame resistant compared to its less costly counterpart. FR-4 is widely used to build high-end consumer, industrial, and military electronic equipment. It is also ultra high vacuum (UHV) compatible. Choosing FR-4 is often a balance of cost and performance. |
| Epoxy Bonded laminates is manufactured using thermosetting resins and specially treated fiberglass cloth suited for use at elevated temperatures. |
| Epoxy sheets are laminated under controlled heat and specified hydraulic pressure to give a compact laminate which is characterized by high dielectric strength, excellent mechanical and thermal properties and good flexural strength. |
| FR-4, an abbreviation for Flame Retardant 4, is a type of material used for making a printed circuit board (PCB). It describes the board substrate, with no copper layer. FR-4 meets the requirements of Underwriters Laboratories UL94-V0. The FR-4 used in PCBs is typically UV stabilized with a tetra functional epoxy resin system. It is typically a transparent yellowish color - the green and sometimes red color of a finished board comes from the solder mask. FR-4 manufactured strictly as an insulator (without copper cladding) is typically a difunctional epoxy resin system and a greenish color. FR-4 is similar to an older material called G-10. |
| Applications |
- FR-4 is acceptable for signals up to around 2 GHz, depending on the application.
- FR-4 board carries multiple high-frequency signals. FR-4 provides superior electrical characteristics at higher frequencies.
- FR-4 is also used for manufacturing insulating or structural components.
- FRPs are commonly used in the aerospace, automotive, marine, and construction industries.
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| Advantages |
| FRP allows the alignment the glass fibers of thermoplastics to suite specific design programs. Specifying the orientation of reinforcing fibers can increase the strength and resistance to deformation of the polymer. Glass reinforced polymers are strongest and most resistive to deforming forces when the polymers fibers are parallel to the force being exerted. |
| INDUSTRIAL USES |
| Thermocouples, Floating Neutral, Suspension Links, Bus Tubes at Mantle Lower, Mantle lower, Protection Shield, Mantle Intermediate, Mantle upper, Smoke Hood Assembly, Seal Box, Electrode stuffing Box, Traverse Frame, Slipping Devices, Smoke Hood Suspensions, Equalizer Hangers, Secondary Circuit etc. |
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