Standards and technical data
Standards and technical data
One of the main quality criteria is a high cellulose content. The more, the higher the strength, flexibility and absorption capacity.
Standards and technical data:
It is possible to produce cotton cellulose in grades - 15, 25, 35, 70, 100, 150, 250,350, 650, 1000, as well as according to the technical specifications.
Specifications
Top Grade
1st Grade
2nd Grade
Appearance
Appearance
Mass fraction of alpha cellulose, %, not less than:
-
a. by weight method, for grades:
-
15
98.2
97.2
96
25-35
98.5
97.7
97.5
for others
99
98
97.5
Wettability within
150
140
130
b. according to the photometric method, for grades:
-
-
-
15
98.2
97.2
96
25-35
98.5
97.7
97.5
for others
99
98
97.5
Wettability within
150
140
130
Mass fraction of water, %, no more than:
8
10
10
Mass fraction of ash, %, no more than:
0.1
0.2
0.3
Mass fraction of insoluble in sulfuric acid, %, no more than:
0.1
0.3
0.5
Whiteness, %, not less:
88
85
-
Weight of iron, mg/kg absolutely dry cellulose, not more than:
25
-
-
Degree of polymerization:
1900-3000 (2700 and above for М1000)
Dynamic viscosity, cPa.s (CP), for grades:
15
1,0 -2,0 (10-20)
25
2,1-3,0 (21-30)
35
2,1-3,0 (21-30)
70
3,1-4,5 (31-45)
100
3,1-4,5 (31-45)
150
8,6-11,5 (86-115)
250
11,6-17,5 (116-175)
350
17,6-30,0 (176-300)
650
30,1-43,0 (301-430)
1000
43,185,0 (431-850)