NBR/ Nitrile Butadiene Rubber for Paper, Cloths

Product Overview

Description

 

 

High Ammonia Latex Concentrate (HA Latex) 

• 60% MAL - 60 % DRC concentrated Medium Ammonia Latex

Description

HA Latex Concentrate is obtained by centrifugation and preserved with a high amount of ammonia. It contains 60% Dry Rubber Content (DRC). It is the most common grade of latex used worldwide. It gives excellent films of high clarity and has good adhesion characteristics as a binding agent when suitably compounded. After compounding, it has a wide application especially in dipped products, such as medical and industrial gloves, rubber threads, balloons, prophylactics (condoms), tubing, finger cots, etc. It is also used as an adhesive for casting onto a backing substrate, such as for wood laminate and carpet, and for binding different types of materials.

 

Processing of natural rubber latex into high quality latex concentrate of 60% dry rubber content is done through centrifugation. Centrifuging involves the separation of preserved field latex into two fractions, one containing the concentrated latex of more than 60% dry rubber and the other containing 4-6% dry rubber. Centrifuged latex is today available commercially in two different verities with high ammonia (min.0.7% of ammonia) and low ammonia (max. 0.3% of ammonia). The former is preserved solely with ammonia and later contains one or more preservatives besides ammonia. LA latex has several advantages which include better quality, lower cost of production by way of savings in preservatives, acid and low cost of effluent treatment.

Grades and applications

High Ammonia (HA) -Foam products, dipped goods, adhesives, elastic thread, household and industrial gloves, balloons, rubber bands and finger caps.
Low Ammonia (LATZ) - Preferred for all applications when de ammonia is necessary for product manufacture. Requirement for centrifuged natural rubber latex is given in the table.

 

Specifications:

 

Total solids content, (TSC), % wt.Min 61.5
• Dry Rubber Content (DRC),% wt.Min 60.0
• Non-rubber content % wt.Max (TSC minus DRC) 2.0
• Total Alkalinity (NH3)% wt
• Min 0.60
• Max -
• Mechanical Stability Time (MST) sec.Min 650
• Coagulum content % wt of TSC.Max 0.05
• Copper content, mg/kg,% of TSC.Max 8
• Manganese content, mg/kg, %of TSC.Max 8
• Sludge content, % wt of TSC. Max 0.10
• Volatile fatty acid (VFA).Max 0.20
• KOH number. Max 1.0

Good grades:
60% HA - 60 % DRC concentrated High Ammonia Latex
60% MA - 60 % DRC concentrated Medium Ammonia Latex
60% LA - 60 % DRC concentrated Low Ammonia Latex

PARAMETERS	HA LATEX
Total Solids Content, % Min	Min 61.5
Dry Rubber Content, % Min	Min 60.0
Non-rubber Solids, % Max	Max 2
Ammonia, % on Latex	Min 0.6
Mechanical Stability, s, Min	650
Coagulum Content, % Max	0.03
Copper, ppm, Max	8
Manganese, ppm, Max	8
Sludge Content, % Max	0.1

 

Characteristic	Requirement
Type-HA	Type-LA
Dry rubber content, percent by mass, Min	60.0	60.0
Non-rubber solids percent by mass, Max	2.0	2.0
Coagulum content, percent by mass, Max	0.05	0.05
Sludge content, percent by mass, Max	0.10	0.10
Alkalinity as ammonia, percent by mass of latex	0.6 Min	0.3 Max
KOH number, Max	1.0	1.0
Mechanical stability, Min	475	475
Volatile fatty acid number, Max	0.15	0.15
Copper content, ppm of total solids, Max	8	8
Manganese content, ppm of total solids, Max	8	8

 

Packing
1 Metal Drum (non-returnable; internal-lined) = 205 kg
1 Container, 20-ft FCL (80 Metal Drums) = 16.4 MT
1 Flexi Bag per container, 20-ft FCL = 20 MT
1 ISO tank (returnable) per container, 20-ft FCL = 20 MT