Cellulose acetate is reacted from cellulose and ace tic anhydride, in condition of catalyst and other additives. With acetic acid as solvent, the process of cellulose basically is heterogeneous reaction.
According to the degree of substitution(DS), Cellulose acetate can be commonly classified to cellulose diacetate(DAC) and cellulose triacetate(TAC). Usually, DAC has DS with 2.2-2.5 while TAC has DS with above 2.7.(DS is an average number, It represents the number of -OH which is substituted by -C0CH3)
Product Parameters
| Item |
Specifications |
Test methods |
| Combined acid% |
55.30±0.50 |
GB/T32117-2015 Appendix A |
| Inherent viscosity dL/g |
1.60±0.10 |
GB/T32117-2015 Appendix B |
| Moisture % |
≤ 2.0 |
GB/T32117-2015 Appendix C |
| Blockage value g/m2 |
≥ 25 |
GB/T32117-2015 Appendix D |
| Free acid % |
≤0.0050 |
GB/T32117-2015 Appendix E |
| Ash ppm |
250±10 |
|
| Color, b |
≤ 5.0 |
GB/T32117-2015 Appendix G |
| Bulk density g/m³ |
0.17~0.30 |
|
| Fe ppm |
2.0±0.5 |
|
| Conclusion |
The results conforms withenterprise standards |
