No parameter                                           unit           specification

1          density(at 20+20C)                                  G\cm3              >2.0

2       water absorbtion rate(at 20+2c,24h)                     %                  <0.05

3       tesile strength                                       mpa                >1690

4       bending strength                                     mpa                >1100

5       dry penetration test                                   min                 >50

6       water difussion test(1%bacl,boiling for 100h 12kv\1min)     Ua                 <10

7       shearing stength along laminals                         Mpa                >50

8       volume resistivity(140c,96h)                           Ω*M               >1010

9       dc withstand voltage(10min)                            KV                >50

10  lightning surge withstand voltage(100kv,10mm)            times               >350

11  bending strength at heating conditions               MPA \150                >350

12  stress corrosion(1mol\1hn3,at 67% stress)                H                   >7200h

13  torsion strength                                    MPA                 >800