Malaysian Rubber Council
Natural Rubber Latex Concentrate
Centrifuged high-ammonia latex for dipping, foam and thread lines
Feedstock
Malaysian concentrate plants centrifuge field latex within twelve hours of tapping, which keeps volatile fatty acid low and colour stable. The grade most buyers specify is high-ammonia (HA) concentrate at 60% dry rubber content, packed either in steel drums or in flexitanks for larger contracts.
Because the material is the input to gloves, catheters and foam, the council treats concentrate as the first link in the quality chain. Every drum carries a batch number that can be traced back to the estate or dealer group that supplied the latex, and to the day it was processed.
Typical applications
- Powder-free examination and surgical glove dipping
- Foley catheters and latex tubing
- Moulded foam for mattresses and cushions
- Elastic thread and band extrusion
- Dental dams, probe covers and finger cots
Specification
Natural Rubber Latex Concentrate: tolerances and packing
Figures below are typical production limits. Confirm the revision on the factory certificate before a tender is submitted.
| Type | High-ammonia (HA) centrifuged; low-ammonia (LA) on request |
|---|---|
| Dry rubber content | 60.0% minimum |
| Total solids | 61.5% minimum |
| Ammonia content | 0.65% minimum (HA) |
| Volatile fatty acid | 0.05% maximum |
| Mechanical stability | 650 seconds minimum |
| KOH number | 6.5 maximum |
| Sludge content | 0.10% maximum |
| Colour | Colourless to pale yellow |
| Packaging | 205 kg steel drum; 20 t flexitank; 1 t IBC |
| Shelf life | Six months at 20-30 degrees Celsius, no freezing |
| Reference standards | ISO 2004, ASTM D1076 |
Packing and handling. Drums are lined and sealed with tamper-evident caps. Flexitank shipments are supplied with a food-grade liner and a discharge valve compatible with standard 20-foot containers.
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