General purpose rubbers graded by precise technical standards and not by visual characteristics. Some standards may vary marginally according to origin.
Latex high-grade rubbers produced to precise technical standards featuring fixed viscosity range or Lovibond-controlled colour.
Technically Specified Rubbers (TSR)
|Type||CV 60||CV 50||L||5||GP||10 CV||10||20 CV||20||SIR 10||SIR 20|
|Raw Material||Latex||Latex||Latex||Thin Latex Coagulum||Various||Coagulum||Coagulum||Coagulum||Coagulum||Coagulum||Coagulum|
|Dirt Content % max||0.02||0.02||0.02||0.05||0.08||0.08||0.08||0.16||0.16||0.10||0.20|
|Ash Content % max||0.50||0.50||0.50||0.60||0.75||0.75||0.75||1.00||1.00||0.75||1.00|
|Volatile Matter % max||0.80||0.80||0.80||0.80||0.80||0.80||0.80||0.80||0.80||0.80||0.80|
|Nitrogen Content % max||0.60||0.60||0.60||0.60||0.60||0.60||0.60||0.60||0.60||0.60||0.60|
|Initial Wallace Plasticity (Po) min||35||30||30||30||30||30|
|Plasticity Retention Index (PRI) min||60||60||60||60||50||50||50||40||40||60||50|
|Colour Index Lovibond Scale max||6.0/2.0|
|Mooney Viscosity ML||60+5, -5||50+5, -5||65+7, -5||60+7, -5||65+7, -5|
It is produced from fresh coagulam and or from unsmoked sheets, Ribbed smoked sheets and Air dried sheets.
TSR-5 has superior strength property together with low mill shrinkage and good tack. It processes better especially in extrusion, calendering, and joining of cycle inner tubes.
Can be used with benefit for general purpose friction and extruded products, small components in passenger vehicles, resilient bush/mountings, sealing rings, cushion gum, brake seals, bridge bearing, ebonite battery plate, seperators, adhesives, plant linings etc.
TSR - 10
TSR - 10 is produced from clean and fresh field coagulam or from unsmoked sheets.
TSR - 10 has good technological properties similar to those of RSS-2 and RSS-3, but has the advantage over RSS from (1) lower viscosity and (2) easier mixing characteristic(slightly more rapid breakdown) as well as being technically specified and packed in modern packing.
Can be used for tyres, inner tubes, cushion gum stocks, joint rings by injection moulding, raincoat proofings, microcellulor sheets, for upholstery and packing, conveyor belts and foot wears.
It is a large volume grade of technically specified natural rubber. It is produced mostly from field coagulam, with lower grades of RSS and or unsmoked sheets.
TSR-20 has excellent processing characteristics and good physical properties. Its low viscosity and easier mixing characteristic(compared with the RSS grades) will reduce the mastication and mixing period considerably.
Used mostly for tyres, cushion gum stock, bicycle tyres, raincoat proofings, micro-cellular sheet for upholstery and packing, conveyor belts, foot wear and other general products.
TSR - CV
TSR-CV is produced from high quality field latex. Rubber is viscosity stabilized at narrow money viscosity range. The acclerated storage hardening of this grade of rubber will be within 8 units.
TSR-CV Rubbers are generally softer than conventional grades. Coupled with its constant viscosity feature, it provides a unique cost advantage in eliminating the premastication process and high reject rates, when used in open mill the rubber forms coherent band almost instantaneously thus increasing the milling through put. The non scorch characteristics of the rubber will permit higher curing temperature to be adopted without risk of rejects.
Additional benefits of TSR-CV
- Reduction on mixing period giving higher throughput.
- Reduction of scraps and rejects.
- Better resistance to chipping and chunking of, off the road tyres
- Better green strength
Can be used for high quality products such as mechanical mountings for engine and machinery, railway buf fers, bridge bearings, vehicle suspension systems and general automotive components large truck tyre tread, conveyor belt covers, cushion gum for retreading, wind-shield wiper blades, masking tapes, brake assembly units, injection moulded products including rubber/metal bonded components, low density sponge, tee gum cushion compounds, springs, industrial rolls, inner tubes and cement.
It is a light colour rubber produced from high quality latex, having low ash and dirt content .
The attractive features of TSR - L is the light colour property together with its cleanliness and excellent heat ageing resistance. Technologically TSR - L exhibits excellent vulcanisate properties having high tensile strength, modulus and elongation at break for both black and non black mix. Higher hardness product can also be obtained with suitable compounding.
Can be used for light coloured and transparent products such as surgical/pressure sensitive tapes, spread textiles, rubber bands, hot water bottles, surgical/pressure sensitive tapes, spread textiles, rubber bands, hot water bottles, surgical and pharmaceutical products, large industrial rollers for paper printing industry, gas masks, swin fins and caps, sport foot wear, rubberised curtaining , bicycle tubes, chewing gum, tennis balls, cable sheaths, washing machine gaskets and adhesive solutions and tapes.