- Pale Yellow in colour so that this can be used as Raw Material for coloured goods manufacturing.
- Contamination of dirt is very low, that is below 0.05%.
- Consistency in specifications of Physical & Chemical properties.
Product Grades
We manufacture Technically Specified Natural Rubber (TSR), from Off grade Sheet and Field Coagulum (Cup Lumps and Tree Lace) through the Wet & Dry process. Natural Rubber (NR) is processed into blocks and is named Block Rubber. In India, block rubbers are to be marketed with ISI (Indian Standards Institution) specifications and therefore, this rubber is termed as Indian Standard Natural Rubber (ISNR).
Our product range includes;
- ISNR 5 (from Latex Coagulum, Undried Sheets)
- ISNR 10 (from Latex Coagulum, Cuplumps)
- ISNR 20 (Field Coagulum)
Apart from normal TSR (BIS Standards), we also produce Tyre Grade TSR with better parameter in each grade. These standards are applied to natural rubber processed in block form (crumb)from latex and field grade materials such as cuplump, coagulam, treelace.
ISNR 5
Used for general purpose moulded and extruded products, components of passenger vehicles, engine mountings, sealing rings, cushion gum, brake seals, bridge bearings, ebonite battery plate separators, adhesives & plant linings. Characteristics of ISNR 5 include
ISNR 10
Used for puncture patches for tyres, inner tubes, cushion gums stocks, joint rings by injection moulding, raincoat proofing, micro-cellular sheets for upholstery and packing, conveyor belts and footwear.
- Processed from sheet & field coagulam.
- Quality equivalent to RSS - 4 grade
- Consistency in specifications of Physical & Chemical properties
- Low mastication time and savings in power compared to RSS
- Packed as 25 Kg bales and Wrapped in LDPE bags.
ISNR 20
Used mostly for tyres, cushion gum stock, bicycle tyres, raincoat proofing micro-cellular sheets for upholstery and packing, conveyor belts & footwear.
ISNR 10 & ISNR 20 are most competitive grades of ISNR available in the market. The raw material used for the production of these grades are field coagulam mainly Tree lace and Cup lumps. The main process steps are raw material selection, soaking, pre-cleaning, blending size reduction, crumbing, final washing, drying, baling and packing.
ISNR 10 & ISNR 20 are most competitive grades of ISNR available in the market. The raw material used for the production of these grades are field coagulam mainly Tree lace and Cup lumps. The main process steps are raw material selection, soaking, pre-cleaning, blending size reduction, crumbing, final washing, drying, baling and packing.
WEIGHT & DIMENSIONS
Natural rubber in block form (crumb) is pressed into bales of rectangular shape with weight and dimensions specified as after 700mm x 360mm x 140mm and weight 25 kg or 35 kg or 33.33 kg +-0.5%
TECHNICAL SPECIFICATIONS
The specification of Indian Standard Natural Rubber in Block conforms to the standard limits stipulated as below:-
| PARAMETER | GRADE | TESTING METHODS | ||
|---|---|---|---|---|
|
ISNR 5 OFF SHEET MATERIAL |
ISNR 10
ISNR 20 FIELD GRADE MATERIAL |
|||
| Dirt content,%wt.Max | 0.0 | 0.08 | 0.16 | IS 3660-1972 |
| Volatile matter,%wt.M ax | 0.80 | 0.80 | 0.80 | IS 3660-1972 |
| ash content,%wt,Max | 0.60 | 0.60 | 0.80 | IS 3660-1972 |
| Nitrogen content,%wt. Max | 0.60 | 0.60 | 0.60 | IS 3660-1968 |
| Initial plasticity(po).Min | 30.00 | 30.00 | 30.00 | IS 3660-1971 |
| Plasticity retention index(PRI).Min | 30.00 | 30.00 | 30.00 | IS 3660-1971 |
| Color coding marker | GREEN | BROWN | RED | |
*Testing for compliance shall follow ISO test methods*