structure
1.POM with lead 0.3-0.5mm
2.Prorous bronze 0.2-0.3mm
3.Steel backing 0.4-2.2mm
4.copper plating 0.008mm

Max Carring Capacity              140N/mm2

Max sliding Speed <dry>          2.7m/s

Max Sliding Speed<oil>           5.3m/s

Betake Temperature When Make and Break       -40~130oC

Coefficient of wear K                3×10-11mm2/N

Coefficient of Wear <m-200>dry  0.15-0.25

                                         oil   0.05 -0.15

Coefficent of expand                   3×10-5/oC

Coefficient  of transmit hot           40W/MK