National Standard and Enterprise Standard
Category \ Item | Powder | 25%compressed product※ | 50%compressed product | 75%compressed product | 100%compressed product※ | granular acetylene black※ |
Apparent specific volume(ml/g) | 30~50 | 20~25 | 14~17 | 9~12 | 7~9 | 3~5 |
Iodine absorption (g/kg)≥ | 80 | 90 | 90 | 80 | 90 | 90 |
Hydrochloric acid absorption (ml/g) ≥ | 3.9 | 4.5 | 3.9 | 2.9 | / | / |
Resistivity(Ω.m) ≤ | 3 | 2.5 | 2.5 | 5.5 | 3.5 | 6.50 |
PH value | 6~8 | 6~8 | 6~8 | 6~8 | 6~8 | 6~8 |
Loss on heating(%) ≤ | 0.4 | 0.3 | 0.3 | 0.4 | 0.3 | 0.50 |
Ash content(%)≤ | 0.3 | 0.2 | 0.2 | 0.3 | 0.2 | 0.3 |
Grit content(%)≤ | 0.03 | 0.02 | 0.02 | 0.03 | 0.00 | 0.00 |
Impurities | NO | NO | NO | NO | NO | NO |
【Absorption intensity ml/5g】 ≥ | / | / | / | / | 19.0 | 18.0 |
【Oil Absorption Value ml/100g 】≥ | / | / | / | / | 190 | 190 |
Remarks: 1、The above indexes are National Standards(GB), the indexes of items with " ※ " are
Hexing's Standards refering to National Standards(GB).
2、Testing method is based on GB/T3782-2006, the indexes with "【 】" are based on
Hexing's Standard; Some index could be adjusted in accordance with customer's
requirements.