Why it matters
Tear resistance and tensile strength usually trade against each other. Push tear strength up in an elastomer system and you commonly lose elongation at break — or gain brittleness that shows up as cracking at a stress riser months into service.
For parts that flex under load — belts, rollers, footwear, industrial covers — that trade-off is the failure mode. The part either splits at a nick or fatigues from being too stiff to move.
How MCPU solves it
MCPU elastomer technologies reinforce the polymer matrix at the molecular level: controlled hard-segment content, tuned chain-extender selection, and prepolymer architecture that distributes stress instead of concentrating it. The result is higher tear propagation resistance while tensile and elongation stay in spec.
We formulate against your actual test protocol — die C tear, split tear, or a fatigue-flex rig — so the improvement shows up in your qualification data and not just on a datasheet.
Test data & spec snapshot
Representative values — actual performance depends on your formulation. Pilot data available on request.
| Mechanism | Molecular-level matrix reinforcement, tuned hard-segment content |
|---|---|
| Balance target | Tear resistance without loss of tensile or elongation |
| Test methods | ASTM D624 die C · split tear · fatigue flex |
| Processing | Cast, pour-in-place, and spray-applied systems |
Typical applications
- Footwear outsoles and midsoles
- Drive belts, rollers, and wheels
- Industrial covers, liners, and wear parts
- Filtration end caps and gaskets under cyclic load