Cream
Latex
 NC-
358
NC- 360
BSP is the largest producer
of cream latex in the world. Its Bunut Factory was the site of research
and development of cream latex in 1920s and it is now the processing
facility of cream latex. The process involves the use of ammonium
alginate to induce concentration of field latex into cream latex
with high solids content.
Cream latex comes in two
grades, NC-358 and NC-360. The main difference between these two
grades is that NC-360 is a low protein latex having a nitrogen level
of 0.03-0.05%. The extractable protein on cast film of NC-360 by
ASTM Lowry test method is below detectable level. Therefore, NC-360
has low protein allergenicity.
Typical properties of these two latices are
as follows:
| Total solids content % min. |
67.5 |
66.5 |
| Dry rubber content % min |
66.5 |
66.0 |
| Total Non-rubber solids % max |
1.0 |
0.5 |
| NH3 on latex % |
0.67 |
0.67 |
| KOH number |
0.65 |
0.30 |
| VFA number |
0.02 |
0.02 |
| Mechanical stability, sec |
1000-1500 |
1000-1500 |
| Sludge content, % |
0.008 |
0.004 |
| Coagulum content, % |
0.004 |
0.004 |
| Odor |
Sweet |
Sweet |
| Copper content, ppm |
3 |
< 3 |
| Manganese |
4 |
< 4 |
| Filterability |
14 |
14 |
| ASTM Lowry EP |
N/A |
Below detection |
| Nitrogen content, % |
0.24-0.30 |
0.03-0.05 |
Applications
Ideal for dip goods, adhesives
and medical products.
Our products:
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