BS 2880:1991

Committees responsible
Foreword
1 Scope
2 Definition
3 Method 1. Determination of moisture content
4 Method 2. Determination of ash content
5 Method 3. Determination of acetic acid yield
6 Method 4. Determination of bulk density
7 Method 5. Determination of the particle size distribution
8 Method 6. Determination of free acidity
9 Method 7. Determination of viscosity ratio of a 5 g/L
             solution at 25 degrees C
10 Method 8. Determination of viscosity at a concentration
             of 60 g/L
11 Method 9. Determination of viscosity at 25% concentration
             at 25 degrees C
12 Method 10. Determination of insoluble particles
13 Method 11. Determination of original light absorption and
              change of light absorption after heating of
              plasticized cellulose acetate
14 Method 12. Determination of the reduction in viscosity
              ratio on moulding
Publication(s) referred to

Describes the methods for characterizing acetate flame which have been updated in line with internal standards in this area.

This standard describes methods of test for the following cellulose acetate flake properties: moisture content; ash content; acetic acid yield; bulk density; particle size distribution; free acidity; viscosity ratio of a 5 g/L solution at 25 °C; viscosity at a concentration of 60 g/L; viscosity at 25 % concentration at 25 °C; insoluble particles; original light absorption and change of light absorption after heating of plasticized cellulose acetate; the reduction in viscosity ratio on moulding. NOTE The titles of the publications referred to in this standard are listed on the inside back cover.