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Detail Information

Color: Light Green And Yellow Size: 1020*1220mm
Thickness: 0.2-70mm Tensile Strength: ≥300MPA
Compressive Strength: >350MPA Flame Resistance: V-0
Temperature Index: F Class
High Light:

1020*1220mm FR-4


laminate sheet fiberglass epoxy FR-4

Product Description

Product Introduction of FR-4 material :


Fiber glass epoxy FR4 sheet is a composite material composed of woven fiberglass cloth with an epoxy resin binder that is flame resistant (self-extinguishing) UL94-V0.
"FR" stands for flame retardant, and denotes that the material complies with the standard UL94V-0.
FR-4 sheet is a popular and versatile high-pressure thermal plastic laminate grade with very excellent strength to weight ratios.

With near zero water absorption, fiber glass epoxy sheet is most commonly used as an electrical insulator machining considerable mechanical strength. The material is known to retain its high mechanical values and electrical insulating
qualities in both dry and humid conditions. The long working temperature of this material is F class , it means continue working temperature is 155℃.These attributes along with good fabrication characteristics, lend utility to this
grade for a wide variety of electrical and mechanical applications.


Feature of FR-4 material as below

* High mechanical & electrical strength

* Excellent rigidity & dimensional stability

* Excellent dielectric properties

* Low water absorption

* Flame resistance ,UL94-V0

* Tighter thickness tolerance

* Flat and straight sheet

* Smooth and clean surface.

* Easy to machine by CNC , such as drill holes or grinded .

Hong Cheng Grade HC-FR-4
IEC 893/EN 60893 Grade EPGC 202
DIN 7735 Hgw2372.1
Item Test method Unit Typical Values
Physical Properties Color Visual inspection Light green / yellow
Specific Gravity IEC 60893-2:2003 g/cm3 1.90 - 2.15
Water absorption ISO 62:2008 % <0.3
Electrical Properties Electric strength ┴ IEC 60893-2:2003 KV/mm ≥ 14(3.0mm)
Breakdown Voltage // IEC 60893-2:2003 KV ≥ 60
Volume Resistivity IEC 60093:1980 Ω.m ≥ 1.0×1012
Surface Resistivity IEC 60093:1980 Ω ≥ 1.0×1014
(1 MHZ) Dielectric constant IEC 60893-2:2003 4.0-5.5
(1MHZ)Dissipation Factor IEC 60893-2:2003 0.04-0.05
Proof Tracking Index PTI IEC 60893-2:2003 V ≥ 200
Insulation resistance after immersion 24Hrs in Water IEC 60893-2:2003 Ω ≥ 5×1010
Mechanical Properties Flexural Strength ┴ IEC 60893-2:2003 MPa ≥ 340
Charpy Impact strength // IEC 60893-2:2003 KJ/m2 ≥60
TensileStrength IEC 60893-2:2003 MPa ≥300
//Bond Strength // IEC 60893-3-4:2003 N ≥8000
Compressive Strength┴ IEC 60893-2:2003 MPa ≥ 350
Flame Resistance Properties Flame resistance IEC 60893-2:2003 V-0
Temperature Index IEC 60085:2004 155
Toxicant Content E662 Low
Others Acetone Resistance boiled Min 30(OK)

Application of FR-4 material

Epoxy sheet FR-4 with the good properties on mechanical & electrical , this material is widely used high-end insulation parts machining , FPC (flexible printed circuit-board) reinforcement sheet, air gap , cover and base of transformer . planetary wheel, transformer insulation baffle, LV&MV voltage switch, precision test fixture, carbon film printing, electronic insulation parts, gasket,washer,various water sports equipment and blade-tool handle materials.

If the color of epoxy sheet is yellow , it has the good property on ageing resistant . Usually , it was used in out door electrical equipment . Out door with direct solar radiation , the normal material will be accelerated aging.

Electrical insulation material laminate sheet fiberglass epoxy FR-4 0

Electrical insulation material laminate sheet fiberglass epoxy FR-4 1


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