Low dielectric loss glass fiber Low dielectric names D glass fiber, have D3, Dk series. It is low density, low dielectric constant and low dielectric loss. It is an ideal reinforcement for making light weight and high performance radomes with high wave permeability and wide frequency band and print circuit board etc... Specifications D glass fiber Items,D3,Dk Density g/cm3,2.30,2.30 Strength of virgin filament Mpa,2600,2600 Elastic modulus GPa,55,55 Dielectric constant 2210,10HZ,4.5,5.0 Dielectric loss 2210,10HZ,0.0035,0.0035 D glass fiber fabric Specification,D3,Dk Thickness mm,0.22,0.22 Weight g/m2,210,210 Breaking strength N/100*25,Warp,1350,1450 ,Weft fill,1000,1050