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TECHNOLOGY
directions
(12) Improved resistance to gas permeation, air aging and coolant fluids (EPDM seals, roofing); TC 1302 is “devolatilised” and fully cured
(13) 15 to 75 per cent substitution freedom: flat property curves result regardless of percentage level (and grind size is not as critical as with simple raw crumb: #20 mesh or #120 mesh: the same physicals) (14) X, Y, & Z unidirectionality — no planes of weakness
(15) Totally “green”—true Post Consumer Recyclate (PCR)
fulfills many mandates
Today, TCR Claims that TC1302 is a True, Proven, Complete Rubber Compounding Solution, Not Devulcanised
Advances continue in the Tirecycle family of recycle-based rubber compounds, including TC 1302. This has enabled a long- sought product: reactive crumb that mixes “invisibly” into normal virgin rubber at unusually high levels (30 – 80 per cent). It allows large reductions in basic RMC (raw material cost), but with actually equal or improved physical properties.
Handling “on the mill” has been far improved over any prior recyclates, even up to 80 per cent. With TC 1302, only 20
per cent continuous phase of virgin rubber compound, a smooth band forms with no bagging.
Dilution Factor
The tensile strength (psi) stays very flat across the full range. The percentage elongation has a simple dilution factor of 2:1, meaning that 50per cent TC drops percentage elongation by 25per cent, etc. The value at 70 per cent TC dilution of 410 per cent elongation is still a normal tread spec, as is the 2751-psi tensile
Packing Effect
From 30 to 50 per cent, avg. T- min (Torque) is 7.33. From 60 to 80 per cent, it is 15.4. The T- max shows a similar abrupt interface: 30 to 50 per cent is average 27.3; 60 to 80 per cent is average 34.2. We often see a packing effect in these systems, as the particles begin to fill all the available space. This actually
improves other properties: compression set, hysteresis (rolling resistance), traction, and wear.
Curing
TC 1302 cures are similar to standard rubber compounds. Temperatures and cure times can be adjusted to replicate the conditions of most compounds. The compounds utilising high amounts of TC 1302 can be processed on standard rubber equipment. No modifications to equipment are needed, though
like any new compound, the processor needs to practice to get a “feel” for the milling characteristics of the compound. The possibilities of utilising TC 1302 in high composition levels with rubber compounds are exciting, environmentally responsible and cost effective. These compositions represent a new level of technology in recycling rubber resulting in rubber compounds with improved performance and processing capabilities. Innovations in compound developments and application
are still in an early stage and much more can be done in applying these chemical treatments to a variety of products and processes.
References
1. Tun Abdul Razak Research Centre (TARRC)
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