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National Standard: Deproteinized concentration natural rubber latex – Specifications and test methods TCVN 11527:2016

10/09/2020

 National Standard: Deproteinized concentration natural rubber latex –

Specifications and test methods
TCVN 11527:2016
Approved under the Decision No. 4126/QD-BKHCN dated December 28th 2016
of the Ministry of Science and Technology
 
Types and signs of deproteinized concentration natural rubber latex (DPNR latex)
Type
Total nitrogen content, % content
DPNR5
0,05
DPNR15
0,15
DPNR30
0,3
 
Requirements for DPNR latex
Characteristic
Type
Test method
DPNR5
DPNR15
DPNR30
1.  Total nitrogen content, % (m/m) of total solids, max.
0,05
0,15
0,3
TCVN 6091
 (ISO 1656)
2. Total solids content, % (m/m), min.
61,0
61,0
61,0
TCVN 6315
(ISO 124)
3. Dry rubber content, % (m/m), min.
60
60
60
TCVN 4858
(ISO 126)
4. Non-rubber solids, % (m/m), max.
1,7
1,7
1,7
1)
5. Mechanical stability 2), second, min.
650
650
650
TCVN 6316
(ISO 35)
6. Coagulum content, % (m/m), max.
0,03
0,03
0,03
TCVN 6317
(ISO 706)
7. Volatile fatty acid (VFA) number, max
0,06
0,06
0,06
TCVN 6321
 (ISO 506)
8. Sludge content, % (m/m), max.
0,10
0,10
0,10
TCVN 6320
(ISO 2005)
9. Copper content, mg/kg of total solids, max.
8
8
8
TCVN 6318
 (ISO 8053);
ISO 6101-3
10. Manganese content, mg/kg of total solids, max.
8
8
8
TCVN 6319
 (ISO 7780);
ISO 6101-4
11. KOH number, max.
0,7
0,7
0,7
TCVN 4856
 (ISO 127)
1) Difference between total solids content and dry rubber content.
2) Mechanical stability normally stabilizes within 21 days.


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