Refined cotton (Bleached Cotton Linter Pulp)
Standard specifications for ether cellulose grade
Types
Characteristics |
M5 |
M15 |
M30 |
M60 |
M100-I |
M100-II |
M200-I |
Viscosity mPa.s |
1-9 |
10-20 |
21-40 |
41-70 |
71-120 |
71-120 |
121-300 |
Degree of polymerization |
200-500 |
600-800 |
801-1000 |
1001-1300 |
1301-1600 |
1301-1600 |
1601-1900 |
Alpha-cellulose % ≥ |
97.5 |
96.0 |
97.5 |
98.0 |
98.5 |
98.0 |
98.5 |
Moisture content % ≤ |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
Water absorptivity g/15g ≥ |
155 |
145 |
145 |
145 |
150 |
145 |
150 |
Ash content % ≤ |
0.10 |
0.20 |
0.20 |
0.20 |
0.10 |
0.20 |
0.10 |
Sulphuric acid insoluble % ≤ |
0.20 |
0.30 |
0.30 |
0.30 |
0.20 |
0.30 |
0.20 |
Whiteness % ≥ |
80 |
80 |
80 |
80 |
85 |
80 |
85 |
Iron contents mg/kg ≤ |
____ |
____ |
____ |
____ |
30 |
____ |
30 |
Types Characteristics |
M200-II |
M400-I |
M400-II |
M650-I |
M650-II |
M1000 |
Viscosity mPa.s |
121-300 |
301-500 |
301-500 |
501-800 |
501-800 |
> 800 |
Degree of polymerization |
1601-1900 |
1901-2200 |
1901-2200 |
2201-2400 |
2201-2400 |
>2400 |
Alpha-cellulose % ≥ |
98.5 |
99.0 |
98.5 |
99.0 |
98.5 |
99.0 |
Moisture content % ≤ |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
Water absorptivity g/15g ≥ |
145 |
145 |
140 |
145 |
140 |
140 |
Ash content % ≤ |
0.20 |
0.20 |
0.30 |
0.20 |
0.30 |
0.30 |
Sulphuric acid insoluble % ≤ |
0.30 |
0.30 |
0.40 |
0.30 |
0.40 |
0.40 |
Whiteness % ≥ |
80 |
80 |
75 |
80 |
75 |
75 |
Iron contents mg/kg ≤ |
____ |
____ |
____ |
____ |
____ |
____ |
They are alpha-celluloses made from cotton linters by alkaline cooking, bleaching and cleaning for industrial purposes. The pulps are for producing acetate, nitrocellulose and cellulose ethers. They are widely used in food additives, pharmaceuticals, daily-chemicals, construction materials, aerospace, military industries, and paper-making.
Standard specifications for acetate grade
Types Characterisitics |
C100-I |
C100-II |
C200-I |
C200-II |
Viscosity |
71-120 |
71-120 |
121-300 |
121-300 |
Degree of polymerization |
1301-1600 |
1301-1600 |
1601-1900 |
1601-1900 |
Alpha-cellulose % ≥ |
99.0 |
98.5 |
99.0 |
98.5 |
Moisture content % ≤ |
10.0 |
10.0 |
10.0 |
10.0 |
Water absorptivity g/15g ≥ |
160 |
150 |
160 |
150 |
Ash content % ≤ |
0.08 |
0.10 |
0.08 |
0.10 |
Sulphuric acid insoluble % ≤ |
0.10 |
0.20 |
0.10 |
0.20 |
Whiteness % ≥ |
87 |
85 |
87 |
85 |
Iron content mg/kg ≤ |
15 |
25 |
15 |
25 |
Ether extract content % ≤ |
0.15 |
0.25 |
0.15 |
0.25 |
Soda soluble 7.14% ≤ |
2.0 |
3.0 |
2.0 |
3.0 |
Copper content ≤ |
0.20 |
0.30 |
0.20 |
0.30 |
They are alpha-celluloses made from cotton linters by alkaline cooking, bleaching and cleaning for industrial purposes. The pulps are for producing acetate, nitrocellulose and cellulose ethers. They are widely used in food additives, pharmaceuticals, daily-chemicals, construction materials, aerospace, military industries, and paper-making.
Standard specifications for nitrocellulose
Types Characteristics |
X15 |
X30-I |
X30-II |
X60 |
X100 |
X200 |
Viscosity mPa.s |
10-20 |
21-40 |
21-40 |
41-70 |
71-120 |
121-300 |
Degree of polymerization |
600-800 |
801-1000 |
801-1000 |
1001-1300 |
1301-1600 |
1601-1900 |
Alpha-cellulose % ≥ |
96.0 |
97.5 |
97.0 |
98.0 |
98.0 |
98.5 |
Moisture content % ≤ |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
10.0 |
Water absorptivity g/15g ≥ |
145 |
150 |
145 |
145 |
145 |
145 |
Ash content % ≤ |
0.15 |
0.10 |
0.15 |
0.15 |
0.15 |
0.15 |
Sulphuric acid insoluble % ≤ |
0.25 |
0.20 |
0.25 |
0.25 |
0.25 |
0.25 |
Whiteness % ≥ |
80 |
85 |
80 |
80 |
80 |
80 |
They are alpha-celluloses made from cotton linters by alkaline cooking, bleaching and cleaning for industrial purposes. The pulps are for producing acetate, nitrocellulose and cellulose ethers. They are widely used in food additives, pharmaceuticals, daily-chemicals, construction materials, aerospace, military industries, and paper-making.
