Property 

Unit 

High-density

Semi-density 

Common

Tensile strength  

MPa

≥30

≥20

≥10

Elongation at rupture 

%

≥30

≥60

≥100

1MHz dielectric loss tangent

2.5×10-4

--

--

1MHz dielectric constant 

average 1.8-2.2

-

--

Dc breakdown voltage (Normal temperature)

KV/M

average 200
lowest 40

average 60
lowest 6

average 30

Item 

Thickness

Thickness allowance 

Width

Width allowance 

Length 

high-density 

0.015,0.030
0.020,0.035
0.025,0.040

±10%

30-120

±0.3

≥50

semi-density 

0.030,0.035
0.05-0.10

±10%

60-120

±0.3

≥100

common 

0.020,0.025
0.030,0.035
0.040-0.10,

0.05,0.15,

0.08,0.20

0.10,0.30

±10%

60-90+

100-1600

±2.0

≥50

Glass Fiber:

Increases compressive strength, rigidity and wear.
Reduces creep and cold flow 
Minimal effect on chemical and electrical properties

Carbon:

Increases compressive strength, hardness, wear, and load properties. 
Good chemical resistance
Various types and amounts of carbon can be added to alter conductivity

Graphite:

Reduces coefficient of friction 
Reduces initial wear 
Increases strength

Molybdenum Disulfide:

Increases hardness, stiffness, and wear
Minimal effect on chemical and electrical properties

Bronze:

Increases hardness and wear resistance
Increases dimensional stability and compressive strength
Not suitable for corrosive or electrical applications