The race to create the world’s next great performance shoe is no longer just about design. It’s about engineering. It’s about how precisely you can shape, expand, and tune the very materials your athletes run on.
That’s what Gentrex was built to do.
Tienkang’s Gentrex Supercritical Fluid (SCF) Injection Platform brings a new level of control, cleanliness, and consistency to footwear manufacturing. It allows brands to engineer midsoles at the molecular level, using the clean power of supercritical nitrogen to achieve lighter, stronger, and more responsive foams than ever before.
This isn’t the next step forward — it’s an entirely new playing field.
Why Gentrex Changes Everything
Every major footwear revolution has come from foam innovation. EVA. TPU. Chemical foams. Bead systems. Each advanced the industry, but each came with trade-offs: weight, durability, recyclability, or control.
Gentrex solves all of them.
By infusing nitrogen directly into the polymer melt in its supercritical state, Gentrex creates a perfectly uniform microcellular structure inside every midsole. The result is foam that’s lighter yet stronger, with more consistent energy return and cleaner rebound from heel strike to toe-off.
It’s the foundation for the next generation of super shoes — performance platforms that are not only faster and more efficient, but also made through cleaner, safer, and more sustainable manufacturing.
Performance Born From Precision
Supercritical nitrogen is the key. Unlike chemical foaming agents, nitrogen is pure, stable, and infinitely controllable. Pressure, temperature, and injection timing can all be tuned to define the exact cell size and density required for a specific performance goal.
That level of precision means:
• Consistent density across every shot and cavity
• Fine, uniform cell structure that improves energy efficiency
• Higher tensile strength with lower overall weight
• Shorter cycle times and higher production throughput
No chemical residues. No volatile blowing agents. No unpredictable foam collapse.
Just precision, repeatability, and control.
Cleaner Manufacturing, Smarter Sustainability
Sustainability isn’t just a buzzword — it’s now a requirement. Gentrex gives brands a way to reduce impact without sacrificing performance.
Because the system is entirely physical, there are no toxic chemical blowing agents, no off-gassing, and no chemical residues. Nitrogen, the most abundant gas in the atmosphere, is recycled within the closed-loop system.
That means:
• Zero harmful emissions
• Minimal material waste
• Lower energy consumption
• Longer mold and equipment life
Every pair of shoes produced through Gentrex represents a cleaner future for the industry — one where sustainability is engineered into the process itself.
Freedom to Design. Power to Build.
Gentrex works across nearly any thermoplastic elastomer: EVA, TPU, TPEE, POE, or ATPU. It enables multi-density construction within a single mold, giving designers the freedom to integrate soft cushioning, firm stability zones, and tuned transition layers in one seamless part.
No lamination. No adhesives. No extra processes.
This flexibility opens new creative possibilities — from high-rebound running platforms to all-day comfort midsoles and lightweight hiking or training shoes.
And because Gentrex is fully modular and scalable, it can fit both pilot development labs and full production lines without major infrastructure changes.
From the Lab to the Track
Gentrex represents the convergence of engineering precision and athletic performance. It enables the kind of foams that define today’s fastest and most efficient footwear — the so-called “super shoes” pushing boundaries in running, training, and recovery.
The advantage isn’t just what athletes feel underfoot. It’s what brands gain behind the scenes:
• Faster cycle times and shorter lead times
• Less material waste and rework
• Lower per-unit costs at scale
• Stronger sustainability credentials
When your competitors are still refining chemistry, you can already be refining performance.
The Future Is Supercritical
The industry has reached a turning point. The next generation of footwear will not be shaped by tradition, but by technology.
Gentrex is that technology — the platform that transforms how performance foam is made, scaled, and perfected. It allows every brand to build the next “super shoe,” not as a one-off innovation, but as a repeatable, reliable process.
Clean. Precise. Sustainable. Powerful.
That’s Gentrex.
Tienkang Gentrex™ — The Power to Shape the Future of Footwear.
Contact Tienkang to learn how supercritical injection can accelerate your next platform.
More information: Supercritical fluid injection -GENTREX